Is the Alpine Loop open?

Seasonal road status, live conditions, and trail reports for the Alpine Loop Back Country Byway and the 4x4 passes of Colorado's San Juan Mountains.

Passes & 4x4 roads

• Engineer Pass — Lake City ↔ Animas Forks
• Cinnamon Pass — Lake City ↔ Animas Forks
• Animas Forks Road (CR 2) — Silverton ↔ Animas Forks
• Black Bear Pass — US 550 (Red Mountain Pass) → Telluride
• Imogene Pass — Ouray (Camp Bird Rd) ↔ Telluride
• Ophir Pass — US 550 ↔ Ophir / SR 145
• California Pass — Animas Forks ↔ Lake Como
• Hurricane Pass — Lake Como ↔ Gladstone
• Corkscrew Pass — US 550 (Ironton) ↔ Gladstone
• Yankee Boy Basin — Ouray ↔ Yankee Boy Basin
• Stony Pass — Cunningham Gulch ↔ Rio Grande headwaters
• Cunningham Gulch — Howardsville ↔ Stony Pass road
• Picayune & Placer Gulch — Loop from Animas Forks
• Eureka Gulch — Eureka townsite ↔ Sunnyside Mine
• Clear Lake Road — South Mineral Rd ↔ Clear Lake
• South Mineral Road — US 550 ↔ South Mineral Campground

When does the Alpine Loop open?

Cinnamon Pass usually opens first (late May), with Engineer Pass following in early-to-mid June; the loop closes with the first big snow in late October. Higher spurs like Black Bear and Imogene open mid-to-late July.