Monitor Mammoth Lakes Traffic in Real-Time
Access 25+ live traffic cameras across Mammoth Lakes, the US-395 Eastern Sierra spine through Mono County, CA-203 from the highway up to Mammoth Mountain Main Lodge and Canyon Lodge, and the seasonal Tioga Pass climb to Yosemite's east entrance. Whether you're chasing a 400-inch powder day at California's largest ski resort, threading the only paved approach to the Yosemite east gate, or driving the 270-mile US-395 corridor between Reno and the Mojave, our interactive map provides real-time visibility on a region where one closed road can isolate an entire valley. Live feeds from Caltrans and QuickMap cover the US-395 spine, CA-203 Main Street, the Mammoth Mountain access roads, and the Tioga Pass gate during its short summer window.
Free 24/7 access • Real-time Caltrans QuickMap feeds • No registration required
VIEW MAMMOTH LAKES CAMERAS →Mammoth Lakes sits at 7,880 feet on the eastern slope of the Sierra Nevada, the only incorporated town in Mono County — California's fourth-least populous county with a permanent population of just 13,195 per the 2020 Census. The town itself recorded 7,191 year-round residents, but that number is functionally meaningless on a powder weekend or July 4th: Mammoth's seasonal population swells well past 30,000 when Mammoth Mountain Ski Area, Yosemite east-entrance traffic, summer mountain bikers, and June Lake Loop visitors converge on a single CA-203 spur off US-395. The geography is unforgiving — one paved road in, one paved road out, and roughly 270 miles of high-desert two-lane highway between the nearest interstate (I-80 at Reno) and the next one (I-15 at Hesperia).
Mammoth's Camera Coverage Network
Our platform aggregates 25+ live cameras spanning the Eastern Sierra corridor through Mammoth Lakes — densest along US-395 itself, with additional CA-203 feeds covering the climb from the highway through downtown Mammoth and on toward the Mammoth Mountain Main Lodge and Canyon Lodge bases. Coverage extends north to Conway Summit and Lee Vining (the Tioga Pass junction at the south shore of Mono Lake) and south through the Long Valley caldera toward Bishop. This is sparse country by population, but every available camera matters because there are no useful alternates when something closes.
US-395 North to Reno
6+ cameras monitoring the Eastern Sierra spine northbound from Mammoth past June Lake, Lee Vining, Bridgeport, and Topaz Lake toward Carson Valley and Reno.
US-395 South to Bishop
5+ cameras covering the southbound climb out of Mammoth past Crowley Lake, Tom's Place, and the Long Valley caldera toward Bishop, Lone Pine, and the Mt. Whitney portal.
CA-203 / Mammoth Mountain
5+ cameras along the only paved spur from US-395 west into town, continuing as Main Street and Minaret Road toward Mammoth Mountain Main Lodge.
Downtown & Old Mammoth Road
4+ cameras across the Main Street commercial corridor, Old Mammoth Road, and the Lake Mary Road basin approach.
Tioga Pass / Yosemite East
3+ cameras at and approaching the CA-120 / US-395 junction at Lee Vining — the gate to Yosemite's 9,943-foot east entrance during its short summer open window.
Conway Summit & Mono Lake
2+ cameras at Conway Summit (8,138 ft) and the Mono Lake basin — the highest point on US-395 in California and a regular winter chain control zone.
Features
Interactive Map
Zoom into the Eastern Sierra to see every US-395, CA-203, and Tioga Pass feed clustered geographically
Grid View
Scan all Mono County cameras at once during winter storm cycles, holiday weekends, or wildfire smoke events
Save Favorites
Bookmark the Mammoth Mountain Main Lodge approach, US-395/CA-203 junction, Conway Summit, and Tioga Pass gate for one-click checks
Live Updates
Real-time Caltrans and QuickMap feeds covering US-395, CA-203, and CA-120
24/7 Access
Verify pass conditions before predawn powder runs or post-Yosemite returns over Tioga
Mobile Friendly
Pull up cameras at the Mammoth Adventure Center, the Reds Meadow shuttle stop, or the Lee Vining Mobil station
About Mammoth Lakes Traffic Cameras
Mammoth Lakes was incorporated in 1984 around what had been a small mining and resort settlement, but its modern identity is built almost entirely on Mammoth Mountain Ski Area — opened in 1953 by Dave McCoy and now California's largest ski resort. The mountain rises to 11,053 feet, making it the highest chairlift-accessible ski resort in California, and averages roughly 400 inches of snow per year across 3,500 skiable acres, four base lodges, 150 named trails, and 11 terrain parks. Pacific storms that Sierra Crest stations to the west wring dry deliver one of the longest reliable ski seasons in North America — typically mid-November through Memorial Day, with some seasons extending into July or even Labor Day. That length is the single most important fact about Mammoth's traffic profile: while Aspen or Park City shoulder out by mid-April, Mammoth keeps generating June and July ski-day traffic on top of its summer hiking and Yosemite-corridor surge.
According to the Mono County Regional Transportation Plan and Caltrans traffic counts, US-395 carried roughly 10,200 average annual daily vehicles at McGee Creek (just south of Mammoth in the Long Valley area) in 2022. By contrast, the same survey shows just 4,000 AADT at Mill Creek Bridge near Bridgeport and 1,900 AADT at the SR-158 / US-395 junction in June Lake — a five-fold difference across 60 miles. The Mammoth section is by far the busiest stretch of US-395 between Reno and Bishop, almost entirely driven by Mammoth Mountain access.
The driving reality of Mammoth is that CA-203 is the only paved connector from US-395 west into town and on to the mountain. Per Wikipedia, CA-203 leaves US-395 at the Mammoth Junction interchange, climbs roughly 1,000 feet through town as Main Street, and continues as Minaret Road past Canyon Lodge and the Mammoth Adventure Center toward Mammoth Mountain Main Lodge. The road is plowed and open year-round to Main Lodge, but Caltrans closes the segment from Minaret Summit to the Madera County line each winter — typically before Thanksgiving — and it usually doesn't reopen until close to Memorial Day. That winter closure is what cuts off the Devils Postpile National Monument and Reds Meadow until the seasonal shuttle reopens in early July.
Mammoth Lakes Street Cameras vs. Traffic Cameras
While often used interchangeably, Mammoth Lakes street cameras and traffic cameras serve the same purpose: real-time situational awareness. Whether you're searching "Mammoth Lakes street cameras" to check Main Street during a holiday surge or "US-395 traffic cams Mammoth" to verify a powder-day commute from Bishop or Bridgeport, our platform pulls from the same Caltrans QuickMap network — letting you confirm whether snow is sticking on Old Mammoth Road, whether CA-203 is chain-controlled, or whether Conway Summit is open before committing to the long drive between Reno and the Mojave.
US-395: The Eastern Sierra Spine
US-395 is the most consequential road in eastern California's daily life — and it runs straight through Mammoth Lakes' front door. The route enters California at the Nevada line south of Carson City, threads through the Carson Valley and Topaz Lake, climbs Conway Summit (8,138 feet — the highest point on US-395 in California), drops to Lee Vining at the south shore of Mono Lake, and continues south past the CA-203 Mammoth Junction, through the Long Valley caldera, into Bishop, past Lone Pine and the Mt. Whitney portal, then through Olancha, Pearblossom, the Mojave, and on toward I-15 at Hesperia and the San Bernardino direction.
US-395 Through Mammoth Country
- Reno (NV) — I-80 junction, the northern departure for Eastern Sierra trips
- Carson City (NV) — State capital, US-50 Tahoe junction
- Topaz Lake — CA/NV state line
- Bridgeport — Mono County seat, Bodie ghost town turnoff
- Conway Summit — 8,138 ft — highest US-395 point in California
- Lee Vining — CA-120 Tioga Pass junction, Mono Lake south shore
- June Lake Loop (CA-158) — Scenic side route off US-395
- Mammoth Junction (CA-203) — The only paved access into Mammoth Lakes
- Crowley Lake / Tom's Place — Long Valley caldera fishing access
- Bishop — Largest town in Inyo County, US-6 junction
- Lone Pine — Mt. Whitney portal, Alabama Hills
- Olancha — Owens Valley south end
The most consequential feature of US-395 through Mono County is what happens when something goes wrong. There is no useful alternate within hours — the parallel routes east of the Sierra Crest are gravel forest roads, and the trans-Sierra crossings (Tioga, Sonora, Ebbetts, and Monitor passes) are all closed in winter. When a serious crash closes US-395 north of Mammoth, the only options are to wait or drive south to Bishop and back over Westgard Pass into Nevada — typically a 4-6 hour detour. Camera feeds at Conway Summit, Lee Vining, the Mammoth Junction, and the Sherwin Grade help drivers spot a developing closure before committing to a long stretch with no exit.
US-395 Mono County Crash Reality
US-395 through Mono County has a documented pattern of fatal head-on collisions on its long two-lane stretches between Bridgeport and Lee Vining and through the Long Valley caldera. The "rattlesnake curve" segment between Mono City and Bridgeport has been the location of multiple multi-vehicle fatal incidents in recent years per Mono County Sheriff reports. Black ice on north-facing curves, deer crossings, fatigue on the long monotonous Owens Valley straightaways, and inexperienced visiting drivers all contribute. Always check Conway Summit, Lee Vining, and Sherwin Grade cameras during winter storm cycles before committing to the corridor.
Check US-395 Through the Eastern Sierra Right Now
View live cameras across the full Mono County stretch of US-395 before you commit to the drive. Mountain weather can shift from clear to chain-required between Bridgeport and Mammoth in under an hour, and there are no useful alternates — verify Conway Summit and the Sherwin Grade before leaving Reno or Bishop.
VIEW US-395 CAMERAS →CA-203 and the Mammoth Mountain Powder-Day Surge
CA-203 is short — about 5 miles from US-395 to Mammoth Mountain Main Lodge — but it carries the entire weight of the resort's traffic. The road climbs roughly 1,000 feet from the highway through Main Street, with the major commercial cores (Old Mammoth Road, the Village at Mammoth, Lake Mary Road) branching off Main Street as it rises. Past the Village the road becomes Minaret Road and continues past Canyon Lodge, the Mill Cafe, and the Adventure Center to Main Lodge at roughly 8,950 feet.
Mammoth Mountain anchors a year-round economy that few comparable resorts match. The summer season includes the Mammoth Bike Park (one of North America's largest lift-served bike parks), road cycling, fishing on the basin lakes, and Reds Meadow / Devils Postpile access via the mandatory Eastern Sierra Transit Authority shuttle — which typically operates from early July through Labor Day, with private vehicles barred on the Reds Meadow road during shuttle hours (roughly 7:30 AM to 7:00 PM). That mandatory shuttle is itself a traffic story: every Devils Postpile and Rainbow Falls visitor in summer must park at Mammoth Adventure Center or use the Mammoth Lakes town shuttle to reach the bus, concentrating arrival traffic on CA-203 between roughly 8 AM and 11 AM.
Mammoth Peak-Period Patterns
Ski commute (Nov–Jun): 7:30–9:30 AM eastbound CA-203 toward Main Lodge; 3:30–5:30 PM westbound back to town. Powder mornings compress everything.
Weekend resort surge: Friday 4–8 PM southbound US-395 from Reno (5+ hour drive), Sunday 1–6 PM northbound back. Holiday weeks (MLK, Presidents, Christmas–NYE) saturate every approach.
Tioga Pass season (Memorial Day–Nov): Yosemite east-entrance day-trippers add a westbound CA-120 surge from Lee Vining, peaking on summer Saturday mornings.
Reds Meadow shuttle (Jul–early Oct): CA-203 fills with shuttle riders from ~8–11 AM through the Adventure Center.
Late-season skiing (May–Jul): Mammoth's most distinctive surge — the only major California resort still spinning lifts on July 4th most years.
Winter chain controls: Conway Summit, Sherwin Grade, and CA-203 west of the Village all see active chain enforcement during major storms.
Tioga Pass: The Yosemite East Entrance
About 30 miles north of Mammoth Lakes, US-395 meets CA-120 at Lee Vining on the south shore of Mono Lake. CA-120 west from this junction climbs sharply to Tioga Pass at 9,943 feet — the highest highway pass in California and the east entrance to Yosemite National Park. For roughly five months of the year (typically Memorial Day weekend through October or early November) Tioga Pass is one of the most spectacular paved drives in the United States and a genuine cross-Sierra alternative to I-80 at Donner Pass or US-50 at Echo Summit.
For the other seven months, it doesn't exist. Per the National Park Service, the median Tioga Road closing date is around November 3, and reopening typically falls in late May or early June. The 2024-2025 winter saw the pass close November 25, 2024 with reopening targeted for Memorial Day Weekend 2026. Snowpack at 9,000+ feet, steep avalanche-prone switchbacks, and the impracticality of plowing roads inside a national park all force the closure. During those months, Mammoth Lakes is no longer a Yosemite gateway — visitors approaching from the Bay Area must use the El Portal (CA-140) or South Entrance (CA-41) approaches and add hours to the drive.
Watch Tioga Pass When Open
See live conditions on the 9,943-foot CA-120 climb during the May–November open window. Verify whether the Lee Vining gate is staffed, snow has cleared from the upper switchbacks, or summer thunderstorms are dropping hail before committing to the trans-Sierra crossing.
CHECK TIOGA CONDITIONS →The Mammoth Lakes Basin and Lake Mary Road
Mammoth's namesake basin sits a few minutes south of downtown — a glacial cirque holding Twin Lakes, Lake Mary, Lake Mamie, and Lake George, all reached via Lake Mary Road from Old Mammoth Road. The basin is the postcard-perfect summer destination: trout fishing, kayaking, backcountry trailheads to the John Muir Trail, and one of the most photographed stretches of the High Sierra. Lake Mary Road is plowed in winter only as far as Tamarack Cross Country Ski Center; the loop around the lakes themselves becomes a Nordic skiing trail system from December through April.
For day-of planning, basin traffic is far more predictable than the ski-day or Yosemite-corridor surges. Summer Saturday mornings see steady westbound flow from Old Mammoth Road, peaking around 9–10 AM, and a late-afternoon return toward town. Cameras on Main Street and Old Mammoth Road give the best read on whether the basin parking lots have already filled.
Mammoth Yosemite Airport and Year-Round Connectivity
Mammoth Yosemite Airport (MMH), 8 miles east of town off US-395, operates seasonal commercial winter service from Los Angeles (LAX), Denver (DEN), and Burbank (BUR) — primarily on Advanced Air, JSX, and United Express partner aircraft. The terminal is small and the service window is short (roughly mid-December through early April), but for Southern California skiers the flight skips a 6-hour drive each way through the Mojave and Owens Valley. During the summer the airport reverts to general aviation only; commercial service does not run.
This matters for the camera workflow because most Mammoth traffic during winter peak weekends is still arriving on US-395 by car — even with airport service, the drive from LA via I-15 north, CA-58 west, and US-395 north remains the dominant access pattern. The Sherwin Grade approach into the Long Valley caldera from the south is the most weather-vulnerable stretch of that drive and the one most worth checking before departure.
Wildfire Smoke and the Long Valley Caldera
Mammoth sits at the north end of the Long Valley caldera — a 200-square-mile geological depression formed by a supereruption 760,000 years ago and still hosting active geothermal features at Hot Creek Geological Site and the Casa Diablo geothermal plant. The caldera's bowl-shape concentrates wildfire smoke during summer fire seasons across California's Sierra Nevada and Owens Valley, often producing visible-air-quality crashes from Tom's Place to Crowley Lake to Mammoth itself. Fire seasons in 2020, 2021, and 2024 each produced multi-day events where ground-truth visibility on US-395 was the single most useful pre-trip indicator — text-only AQI readings lag what cameras show in real time.
Winter conditions are even more decisive. Eastern Sierra storms regularly drop 2-4 feet of snow in 24-48 hours at Mammoth elevations, and the 1969 and 2017 seasons each delivered total accumulations exceeding 600 inches at the mountain. Conway Summit, Sherwin Grade, and CA-203 west of the Village typically see chain enforcement during major storms — and when storms are bad enough to close Donner Pass on I-80, US-395 through Mammoth becomes the de facto detour for Reno-LA traffic, multiplying volume on a road that wasn't built for it.
Eastern Sierra Hazard Realities
- US-395 winter closures: Rare but possible during major storms or high winds. When US-395 closes between Bridgeport and Mammoth, no useful alternate exists for hours.
- Conway Summit chain controls: 8,138 ft is high enough that chains are often required when nothing is required at Mammoth itself.
- Tioga Pass winter closure: November through Memorial Day. Gates are locked; the cross-Sierra alternates are I-80 Donner, US-50 Echo Summit, or hours of southern detour.
- Sherwin Grade: The southbound climb out of the Long Valley caldera toward Crowley Lake is the steepest and most weather-vulnerable stretch of US-395 in Mono County.
- Reds Meadow / Devils Postpile: Mandatory shuttle from July through Labor Day. Private vehicles barred on the access road during shuttle hours.
- Wildfire smoke: The Long Valley caldera bowl traps smoke. Camera ground-truth beats AQI readings during fire season.
Build Your Mammoth Route
Use the route builder to plot your drive from Reno, Bishop, or Yosemite Valley and see every US-395, CA-203, and Tioga Pass camera along the path. Save the corridor for one-click morning checks during ski season, the July 4th surge, and Yosemite-east-entrance summer weekends.
BUILD YOUR ROUTE →Using TrafficVision for Mammoth Lakes
Our platform aggregates Mammoth's 25+ Caltrans cameras alongside 140,000+ cameras from 600+ official sources across 130+ countries and all 7 continents. The most useful Mammoth workflows:
- Interactive map: Zoom into the Eastern Sierra to see every US-395, CA-203, Lake Mary Road, and Tioga Pass feed clustered geographically
- Grid view: Scan the entire Mono County corridor at once during winter storms, holiday weekends, or wildfire smoke events
- Route builder: Plot Reno-to-Mammoth, Mammoth-to-Yosemite Valley, or LA-via-US-395 and see every camera along the path
- Favorites: Bookmark the Mammoth Junction (CA-203 / US-395), Conway Summit, Lee Vining, Sherwin Grade, and Mammoth Mountain Main Lodge approach
- Search and filter: Find feeds by corridor ("US-395") or area ("Mammoth", "Tioga", "Mono Lake")
For broader regional context, see our California state guide, Carson City, Reno, Sparks, Sacramento, Fresno, San Francisco, Oakland, and Los Angeles traffic camera guides. For ski-corridor and mountain-pass planning, pair this guide with our ski-season mountain passes guide, Donner Pass deep dive, and winter driving traffic cameras playbook.
For a different way to explore live cameras worldwide, try CamGuessr — watch a random live feed and guess where in the world it is. Mammoth's distinctive sagebrush-and-granite landscape and the silhouette of the Sierra Crest make for some of the more recognizable Eastern Sierra guesses in the game.
Frequently Asked Questions
How do I get to Mammoth Lakes from Los Angeles?
I-15 north to CA-58 west at Barstow, CA-58 to US-395 north at Kramer Junction, then US-395 north for roughly 200 miles past Mojave, Inyokern, Olancha, Lone Pine, and Bishop to the Mammoth Junction at CA-203 — total drive time roughly 5-6 hours normal, 7-8+ hours on peak ski Friday. The Sherwin Grade southbound climb out of the Long Valley caldera is the most weather-vulnerable stretch. In winter, Mammoth Yosemite Airport (MMH) operates limited commercial service from LAX, BUR, and DEN to skip the drive.
When is Tioga Pass open?
CA-120 over Tioga Pass is open roughly Memorial Day weekend through late October or early November per the National Park Service. The median closing date is around November 3, with reopenings typically late May or early June after avalanche assessment and snow clearing. Mono Basin Research data shows opening dates ranging from early April (1976, 2014 drought years) to late June (heavy snowpack years). When closed, the only Yosemite east-entrance options are hours of detour via El Portal (CA-140) or the South Entrance (CA-41) — Mammoth is no longer a Yosemite gateway from late fall through spring.
How big is Mammoth Mountain compared to other California ski resorts?
Mammoth Mountain is California's largest ski resort with approximately 3,500 skiable acres, 150 named trails, 11 terrain parks, and 4 base lodges per Mammoth Mountain Ski Area. At an 11,053-foot summit, it's the highest chairlift-accessible ski terrain in California. Average annual snowfall is roughly 400 inches, which produces one of the longest reliable seasons in North America — typically mid-November through Memorial Day, with some seasons extending into July. Late-spring skiing is one of Mammoth's most distinctive features; few other major resorts still spin lifts on July 4th.
When does CA-203 close in winter?
Per Caltrans, CA-203 from US-395 to the town of Mammoth Lakes and on to Mammoth Mountain Main Lodge stays open year-round and is plowed regularly. The segment west of Main Lodge — over Minaret Summit and down to the Madera County line, providing summer access to Devils Postpile and Reds Meadow — closes seasonally, typically before Thanksgiving, and usually doesn't reopen until close to Memorial Day. During the open summer window (roughly July through early October), private vehicles are barred on the Reds Meadow road from about 7:30 AM to 7:00 PM and visitors must use the mandatory Eastern Sierra Transit Authority shuttle from Mammoth Adventure Center.
How busy is US-395 through Mono County?
Per the Mono County Regional Transportation Plan and Caltrans counts, US-395 carries roughly 10,200 average annual daily vehicles at McGee Creek south of Mammoth — by far the busiest stretch in Mono County. Traffic drops to roughly 4,000 AADT at Mill Creek Bridge near Bridgeport and just 1,900 AADT at the SR-158 / US-395 junction in June Lake. The Mammoth section is dominated by Mammoth Mountain access traffic, with the heaviest volumes on Friday southbound from Reno and Sunday northbound back, plus the Saturday Yosemite-east-entrance surge during the Tioga Pass open window.
Are Mammoth Lakes traffic cameras free to view?
Yes — every Mammoth Lakes traffic and street camera on TrafficVision.Live is 100% free, no signup required, available 24/7 on desktop and mobile. The feeds come directly from Caltrans QuickMap, the public traveler-information system covering US-395, CA-203, CA-120 / Tioga Pass, and the Eastern Sierra corridor. Cameras refresh every few seconds, so what you see is essentially real-time conditions on the corridor.
Ready to View Mammoth Lakes Traffic Cameras?
Access 25+ live feeds across the US-395 Eastern Sierra spine, CA-203 from the highway up to Mammoth Mountain Main Lodge, the Tioga Pass approach at Lee Vining, and Conway Summit. Free, no sign-up — and indispensable when winter storms close the cross-Sierra passes, July 4th brings the late-season ski surge, or Yosemite east-entrance Saturday traffic stacks at the Tioga gate.
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