2019 Nav-X Mountain Bike @ Deer Creek Hills

Quick Info

  • Date: Sunday, October 20th, 2019

  • Location: Deer Creek Hills

  • Event Director: Andrew Peterson (contact)

  • Course Director: Roy Malone (of Bones Adventure Racing)

  • Courses: 3h Mountain Bike

List of Registered Entrants

Follow this link to an updated list of entrants.

Event Summary

This event is co-produced with Bones Adventure Racing, and Roy Malone from Bones AR will be designing the course for you. It's sure to be exciting as well as challenging, whether you are looking for a beautiful bike outing with friends, or an epic battle for the podium! Come find out what this fun new race format is all about!


Time 3h Course
8:30 Event Check-in (and Day of Event Registration)
9:00 First Timer Clinic
9:15 Event Briefing
9:30 Mass Start
12:30 Finish
13:00 Awards

New to Mountain Bike Map Racing?

Mountain Bike Map Racing is a “Navigation Sport” that has elements of a few other sports and activities like Mountain Biking, Orienteering and Geo Caching. More specifically, Mountain Bike Map Racing is a time-based challenge, 1.5 hours or more in length, where participants try to score as many points as possible within the time allowed, by visiting checkpoints scattered across a vast, wild trail network. Participants decide which checkpoints to visit, and in what order. Typically, a set time is allowed before the start for participants to study the map, and determine their route. Participants ride their bikes and navigate their chosen route using the map and a compass (No GPS allowed except for recording your track). A late finish comes with point penalties, adding another layer of challenge to the sport. Checkpoints have different point values, so that easy ones yield a lower point value than difficult (far away, or lots of climb) ones. To encourage beginners, course setters typically provide plenty of easy checkpoints near the start and finish location.

Venue / Park Info

Deer Creek Hills' 4,500 acres of rolling grasslands and oak woodland preserves the heritage of working ranches and provides endless opportunities for public recreation. The oaks and grasslands also provide habitat for approximately 170 species of birds, 105 mammal species, 58 amphibians and reptiles, and an estimated 5,000 kinds of insects.

The town of Michigan Bar numbered about 15,000 people during the Gold Rush period. The town site (near the Deer Creek Hills Preserve) now hosts only a few stone chimneys. Evidence of small mining operations abounds on the preserve. Basque sheep ranchers ran their livestock here in the 1800’s.

The landscape around you is a typical, extremely scenic low foothill California landscape. The native blue oaks provide important cover for deer, coyotes, bobcats, burrowing owls, mountain lions between the valley and the mountains. Hawks, falcons, eagles, kites, owls, red-winged blackbirds, acorn and Lewis’ woodpeckers abound here.

The preserve is managed by the Sacramento Valley Conservancy.

About the Map

The map was first created in 2016 and then improved for the 2018 California Orienteering Week. The map was produced by the Gold Country Orienteers, enlisting the help of Bill Cusworth. The map S part of the map does NOT include orienteering level detail, but the contours are derived from LIDAR so they are quite accurate. The North side is very detailed and accurate. There was a fire in 2017 that is still recovering, so a small portion of the South area will be out-of-bounds and marked so on the map. The preserve is grazed, so many smaller animal trails may not be on the map, and change from year to year. Map scale is 1:15,000, meaning that 1 cm on the map is 150 m in the terrain. The contour interval (elevation between two contour lines) is 2.5 m (~8 ft).

The terrain is similar to the open terrain at Pacheco, except it is less steep. It is very runnable, and the ability to climb hills will not be the determining factor at this event. There are rock features all over, most of which will not be mapped in the Southern part. Large rock features will be mapped, and used for control locations. It is quite open with typical coastal range oak studded hills. Creeks, ponds and vernal pools will likely have water in themt. We will provide water out on the course in one or two locations.

Courses & Divisions

There will be one course offered:

  • 3 hr Mountain Bike Map Race

Participants can compete in the following divisions for the 3hr course:

  • Junior Female (19 & Under)

  • Junior Male (19 & Under)

  • Junior Team (19 & Under, 2-5 person teams)

  • Open Female (20+)

  • Open Male (20+)

  • Open Team (20+, 2-5 person teams)

  • Masters Female (50 & up)

  • Masters Male (50 & up)

  • Masters Team (50 & up, 2-5 person teams)

  • Family - Adults (20+) + children (18 & under)


Early fees (20% off) through Sept 24th (via online registration).  Regular fee is Sept 25th - Oct 16th (via online registration).  Day of Event Registration is cash or check only.

30% discount for Juniors (already calculated in the table below).

Use of e-stick is included in the fee ($0 rental fee in the registration process). Only one e-punch number or rental request is required per team. On the registration page, please enter "0" for e-punch number if you are not the first person registering for your team.

Discounts for orienteering club members (BAOC/GCO/etc...) $5 for adults, with own e-stick (no member discount for juniors). Discount applied during online registration process. If your e-stick does not have enough punches, you will need to pay non-member fee and receive an e-stick for use at the event.

For family teams, it is required to have at least one adult (20 & over) and at least one child (18 & under). Children 12 & under race free. Children must be registered and accompanied by an adult.

Additional fees to rent a map board ($3) and/or compass ($2).

Early Registration Regular Registration Day of Event Registration
Course Length 3h 3h 3h
Junior (19 & Under) $32 $36 $40
Adult (20+) $44 $50 $55

Refund Policy

Refund policy: 100% refund up to 10 days before event. Future race credit 1-9 days before event. No refunds for no-show.

What to Bring

Wear what you would normally wear for a strenuous bike in Northern California.  Here are some tips:

  • Helmet (required)

  • Bike Gloves

  • Sturdy shoes with a good tread

  • Compass (you may rent one for $2)

  • ePunch (SI stick with 50 control capacity - included)

  • Pen and maybe a highlighter marker (for marking up your map and making notes)

  • Water (enough for the time you will be out on the course)

  • On the go snacks (energy bar, gel, etc.)

  • Map Board for bike (you may rent one for $3)

Map and Directions


From Sacramento and Bay Area

Coming soon

From Truckee/Reno

Coming soon

From South Lake Tahoe

Coming soon