R-306 · Route File
San Juan Mountains, Colorado · United States
The 12,800-foot northern crossing of the Alpine Loop between the Lake City side and Animas Forks, with western connections toward US 550 and Ouray.
red · Confirmation required
An open approach does not prove that the pass or the far side is open and suitable.
Planning response: Check the current status with every responsible county and the Alpine Loop sources before using Engineer Pass as a through route.
Seasonal windows are planning triggers, not a substitute for current road, weather or land-access reports. Recheck the official sources below before departure.
Route tire evidence
No reviewed tire observation is published for this route.
No tire name is inferred from route popularity, forum mentions or marketing. A report appears only after its tire, motorcycle, route context, date and named source are reviewed.
Route-specific references
Information tied directly to this road, track or route.
Regional reference desk
Shared road, weather and access services used across Route Files in this region.
Field Links are reviewed references, not live guarantees. Conditions, closures, services and regulations change. Confirm critical information with the responsible authority before relying on it.