Los Angeles to Mammoth Lakes — Weather & Driving Conditions

Driving from Los Angeles, CA to Mammoth Lakes, CA? This 310-mile route follows US-395. TripCaptain checks the weather at every stop along the way — not just at each end — so you can see where conditions change before you pick a departure time.

What to watch for on this route

In the planner, TripCaptain highlights forecast weather risks between Los Angeles, CA and Mammoth Lakes, CA and summarizes the analysis with a Hazard Score™ from 0 to 100. A higher score indicates lower forecast risk, without guaranteeing road conditions.

• Sierra snow & chain controls: Winter storms can drop heavy snow over the passes and trigger chain controls or full closures. A section that's open at sunrise can require chains or shut down by afternoon, so know before you leave whether the road is open.
• Owens Valley gusts: The open Owens Valley funnels strong crosswinds. Gusts over 60 mph (100 km/h) can push high-profile vehicles and kick up dust, cutting visibility on the long exposed stretches.
• Black ice at elevation: Snowmelt and shaded curves refreeze after dark, leaving clear black ice on the climbs. It's hardest to see in the first hours after sunrise, before the road surface warms.
• Summer wildfire smoke: Late-summer and fall fires can fill the eastern Sierra with smoke, dropping visibility below ¼ mile (400 m) and worsening air quality for hours at a time.

When to go, season by season

• Spring (Mar–May): Passes stay wintry into spring. Late storms can still close the road or require chains at elevation while the valleys warm quickly. Carry chains through April and check the pass is open before you climb.
• Summer (Jun–Aug): The easiest season to drive. Owens Valley heat peaks in the afternoon and thunderstorms can build over the crest — leave early and watch for smoke if fires are active.
• Fall (Sep–Nov): Clear and quiet early, but the first snows arrive by November and wind picks up in the valley. Good conditions midday; plan around early-season storms late in the fall.
• Winter (Dec–Feb): The most demanding season. Expect snowstorms, chain controls, and black ice on the climbs, with hard overnight cold near Mammoth. Travel midday between fronts and carry chains every trip.

Compare departure times

Open Los Angeles to Mammoth Lakes in the planner to check the forecast for your date and compare nearby hours within your plan's limits. Save the trip to follow changing conditions in Live Mode.

Fuel, EV range, and rest stops

See a weather-adjusted fuel or EV energy estimate for the drive, sensible break points across the 310 miles, and a packing list matched to the conditions ahead.

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