A group of women mountain bikers from Los Angeles and Ventura Counties

Concerned Off-Road Bicyclists Association


Covergirl/Coverguy/Covergroup of the Month

January 6th. Mary and Randy on their way back to the cars on the Grasslands Trail in Malibu Creek State Park


New Stuff & Photos of Events

COSCA Spring Trailwork Day (March 22)
Video Slide Show for 2013 (March 20)
Video Slide Show for 2012
(March 14)
Video Slide Show for 2010-11 (March 6)
Video Slide Show for 2009 (March 2)
Space Mountain Trailwork (Feb 23)
Video Slide Show for 2008 (Jan 9)
Grasslands - Short Bulldog Loop (Jan 5)

NRMB Xmas party (Dec 15)
Video Slide Show for 2007 (Dec 1)
Video Slide Show for 2006 (Nov 26)
Adv beginners in Sycamore (Nov 3)

Reseda to Westridge (Oct 26)
Annual COSCA Trailwork Day (Oct 19)
Brown Mountain (Oct 13)
Cherry Canyon
(Oct 6)

Video Slide Show for 2005 (Sept 17)
Video Slide Show for 2004 (Aug 21)
Sycamore Beginners Video (Aug 19)
Grasslands Beginners Ride (Aug 17)
Video Slide Show for 2003 (Aug 16)
Sycamore Cyn Adv Beginners (Aug 4)
Sycamore BBQ ride (Aug 3)

This is the new website.


The North Ranch Mountain Bikers is the biggest and oldest mountain bike riding group in the Los Angeles area. We have two or three rides every weekend and ride on many different trails throughout the year. The Santa Monica Mountains, which span Ventura and Los Angeles Counties, provide the location for the majority of our rides. But ever eager to seek out new trails, more technical single-tracks as well as explore, we often have trips to spectacular locations such as the Santa Barbara area, Big Bear, Mammoth, Lake Tahoe, Kernville, Moab, Sedona and more every year. The rides are recreational and cross-country in nature and not for racing.

We encourage safe, responsible and courteous trail riding. Helmets are mandatory on our group rides and we expect riders to also bring their own water, snack, gloves, sunblock and common-sense tools to fix minor mechanical problems on the trail. We encourage riders to wear operational walkie-talkies (FRS radios that support privacy codes) tuned to channel 5.25. We expect our riders to adhere to the rules of the trail for the safety and enjoyment of all trail users.

We support CORBA, the Concerned Off Road Bicycling Association and IMBA, the International Mountain Bicycling Association as well as the MBU, the Mountain Bike Unit, which are a group of volunteer riders who patrol the trails of the Santa Monica Mountains. Many of our members also belong to these groups.

Join Our E-Group

In addition to this site, we have an egroup set up for group distribution emails. If you want to join the egroup, click here to send Tamara an email, and she'll gladly set you up! If you already belong, and you are a member of Yahoo!, you can get to the North_Ranch_Mtn_Bikers group page directly.

Talk to Us

If you have any questions about a ride, or the group in general, feel free to contact one of us through the emails below:

Webmaster (Steve)--