Driving and Road Safety

Extreme elevation changes over short distances mean valley roads are steep, narrow, and winding but filled with breathtaking vistas. So take your time! A few rules of the road greatly increase your chances of a safe and enjoyable drive.


When going downhill, put the gearshift in 1, 2, or L. The engine gets louder as it slows you down, but it will save your brakes from burning out.

Allow Passing

If you're driving most slowly than others, use paved turnouts to let traffic pass. (If there are several cars behind you, you are probably a slower vehicle!)


Avoid the oil buildup in the middle of uphill lanes and be aware that traffic may not be looking for motorcyclists.

Stay on Established Roads and Pull-outs

Park and travel on pavement or gravel roads only.


Gasoline is not sold within park and valley boundaries. Be sure to fill up in Mammoth Lakes before beginning your trip on Highway.203


Ride only on roads (not trails), single file with traffic, and wear light colors and have lights after dark. Speeds must not exceed those posted on the roads. People under 18 must wear a helmet; helments are strongly suggested for all.

Cell Phones

Service is spotty because of the great distance to cell towers and the rugged terrain. A pay phone is available at the ranger station.

More Information

Roads may close at any time due to snow and ice. If inclement weather is expected or during the spring and fall, call 760-934-2289 to check to see if the road is open.

Last updated: October 25, 2021

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Contact Info

Mailing Address:

PO Box 3999
Mammoth Lakes, CA 93546


760 934-2289

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