Administrative Office Hours

Midpen has closed our main office at 330 Distel Circle in Los Altos in compliance with county health official orders to shelter at home.

Staff are working from home and remain available via telephone or voicemail (650-691-1200) and email ( or individual emails) during regular business hours of 8:30 a.m. to 5 p.m., Monday through Friday.

Midpeninsula Regional Open Space District
Administrative Office
330 Distel Circle
Los Altos, CA 94022-1404

You can also reach us by phone: 650-691-1200; fax: 650-691-0485 or e-mail:

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Emergency Contact Information

To report an emergency on a Midpen preserve, call 650-968-4411. This is the 24-hour dispatch number for Midpen Rangers. Please call this number to report:

  • A medical, police, fire or other emergencies
  • In-progress suspicious activity or crime
  • A missing person
  • Any urgent situation for which you need immediate assistance

Please have the name of the preserve and your location (ex. the trail you are on, or if you’re in the parking lot) available to assist the dispatcher in sending you the appropriate resources.

To report maintenance needs, or for routine questions or information, call our Administrative Office at 650-691-1200. This number is answered during regular business hours, and voice mail is available outside of regular hours. E-mail can also be sent to

The office will be closed on the following days in 2021:

Monday, January 18 (Martin Luther King, Jr. Day); Monday, February 15 (Presidents' Day); Monday, May 31 (Memorial Day); Monday, July 5 (Independence Day observed); Monday, September 6 (Labor Day); Wednesday, November 11 (Veteran's Day); Thursday, November 25-26 (Thanksgiving); Friday, December 24 -Friday, December 31, 2021 (Holiday closure)

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