R-274 · Route File
Central Sierra Nevada, California · United States
The 61-mile National Scenic Byway following State Routes 4 and 89 through a steep, narrow and partly single-lane trans-Sierra crossing.
red · Operational constraint
During the closure, the scenic byway is not a trans-Sierra vehicle route.
Planning response: Confirm the current pass status in Caltrans QuickMap and use an open all-season crossing when the winter gates are closed.
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.
Ebbetts Pass Scenic Byway
official · Federal Highway Administration
National Scenic Byway identity, 61-mile length, narrow single-lane section and winter closure
Highway 4
specialist · Pashnit
Rider-focused Highway 4 reference covering the pass road, narrow sections, curves and connections; confirm seasonal status with Caltrans
Regional reference desk
Shared road, weather and access services used across Route Files in this region.
Caltrans QuickMap
official · California Department of Transportation
Current California closures, incidents, chain controls, cameras and road conditions
Caltrans highway conditions
official · California Department of Transportation
Text road conditions, closures, restrictions and chain controls by highway
Caltrans planned lane closures
official · California Department of Transportation
Current and planned lane closures by district and statewide
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.