The 1st Map Trek event of the 2026 Nav-X season will take place at Diablo Foothills RP and Shell Ridge Open Space near Walnut Creek, CA. 2 & 4 hr courses will be offered. This event will use BAOC's orienteering map of Shell Ridge & Diablo Foothills. The map scale will be 1:12,500 with 5-meter contours. The start will be at the Patrick Hanna Grove Picnic Area which has free parking. This event will use the app "MapRun" for timing on your own schedule. The competitive window for this event is December 20, 2025 - February 28, 2026. Results during this time period will be included in the official results and accrue Nav-X series points but the course will still be available on MapRun until Dec 1, 2026, after which it will move to the archived courses. Upon registration, you will receive (1) registration confirmation, (2) within 24 hours, a separate email with links to map documents. There are also some options for getting a pre-printed map.