Classic East Bay Rides Washed Out by Winter Rains

[Updated March 16, 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.

  • Morgan Territory Road between Oak Hill Lane and Williams Road (just south of Marsh Creek Rd) is closed to all traffic. Bike riders are encouraged to avoid this popular route around the back of Mount Diablo altogether until the closure is resolved. All residential traffic will be on the narrow and steep route south of the closure leaving little room for safe passing. Construction on repairs is currently expected to take place in Summer 2017 (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).
  • 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 has been reopened, but is limited to one lane in some locations with traffic taking turns to proceed through. Please plan ahead and use caution on this route (info here).
  • Redwood​ Road is open, but reduced to one lane of traffic in some locations northwest of Castro Valley due to a shoulder washout. Please proceed with caution when biking in this area (info here).
  • 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).

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