Segment from the Mammoth Mountain Ski Area west to Minaret Summit closed in winter
Major junctions
West end
Minaret Summit
East end
US 395 near Mammoth Lakes
Location
Country
United States
State
California
Counties
Mono
Highway system
State highways in California
Interstate
US
State
Scenic
History
Pre‑1964
Unconstructed
Deleted
Freeways
← SR 202
→ SR 204
State Route 203 is a state highway in the U.S. state of California that serves as a spur route from U.S. Route 395 in Mono County to the town of Mammoth Lakes and Minaret Summit. Within Mammoth Lakes, State Route 203 is known as both "Minaret Road" and "Main Street." It connects to Lake Mary Road and the Mammoth Scenic Loop via secondary roads.
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