Classic East Bay Rides Washed Out by Winter Rains

[Updated April 19, 2017. Check the county public works pages listed below for the latest closure information]

The record-setting rainy season this year has led to washed out roads and bridges around the East Bay, many along popular bike routes. Repairs are in progress but access may will remain restricted for some time. Read on for details, and let us know if you encounter a closure not listed here.

  • UPDATE (4/13/2017): Morgan Territory Road has been reopened to all traffic with a 5 mph speed limit and signals controlling one lane of traffic at a time through the slide area (5 minute wait). As such, please use caution and proceed slowly through this area, and the road may be closed again by authorities without advance notice if conditions change (info here).
  • Alhambra Valley Road between Castro Ranch and Bear Creek Roads is closed indefinitely (storm damage shown above). This is along the ‘Three Bears’ bike route north of Orinda, making this loop inaccessible for the time being. Emergency repairs have been authorized. Work is expected to begin May 1st and continue for two months.

    People biking north on Castro Ranch Road can still continue west on Pinole Valley Road, and the Bear Creek Road connections from Happy Valley Road to Lafayette and Alhambra Valley Road to Pleasant Hill remain open (more info).
  • Canyon Road in Moraga from Pinehurst Road to Constance Place is closed to all traffic due to structural damage on the Canyon Road bridge, which will need to be replaced. Normally the Lafayette-Moraga Trail would bypass this area, but the trail is closed due to a mudslide as well (info here).
  • Calaveras Road from Sunol and Milpitas is closed to all traffic due to storm damage, between Geary Road and Oakridge Road (info here).
  • Palomares​ Road is closed for hillside reconstruction now through May 5between Palo Verde Road, Castro Valley, and Niles Canyon Road, Fremont. (info here).
  • Redwood​ Road is closed due to a roadway failure, at mile marker 7.38 in Castro Valley (info here). Redwood Road from the Oakland side remains open out to the Anthony Chabot campground.
  • Arroyo del Valle Trail in Pleasanton is washed out between Harvest Circle and Main Street, and the Centennial Trail is closed between Val Vista Park and the Pleasanton Canal Trail (map of these and other Pleasanton trail closures here).
  • Comprehensive info about more trail closures at East Bay Regional Parks is available here.

Important phone numbers and webpages

Contra Costa County

  • Updates on current road conditions:
  • Public Works Maintenance Division‐ For emergencies during normal business hours, or to report a clogged drainage inlet: (925) 313‐7000
  • California Highway Patrol‐ For emergencies after hours: (707) 551‐4100
  • Contra Costa County Sheriffs Dispatch‐ For emergencies after hours: (925) 646‐2441

Alameda County

  • Updates on current road conditions:
  • Public Works Agency ‐ To report hazards during normal business hours: (510) 670-5500
  • California Highway Patrol‐ For emergencies after hours: (707) 551‐4100

Resources for reporting landslides, potholes, and other hazards in every East Bay city and unincorporated area are available online at