The 8th event of the 2021 Nav-X season will be Nav-X's first event at Black Diamond Mines Regional Preserve, a park with a history of coal and sand mining as well as ranching. The map, courtesy of Get Lost!, is a combination of improved LIDAR and orienteering level detail, offering a fun challenge as you travel between the areas. Vegetation includes grassland, woodland, chaparral and some exotic species introduced by the coal miners. The park is located on Somersville Road about 3 miles south of Highway 4 near Antioch, CA. This event will use the app "MapRun6" for timing on your own schedule. The competitive window for this event is October 1- November 30. Results during this time period will be included in the official results and accrue Nav-X Challenge series points but the course will still be available on MapRun until the end of 2021. Upon registration, you will receive (1) registration confirmation, (2) within 24 hours, a separate email with links to map documents.

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