The Grinduro series features events in Scotland, Canada, and Japan, but it is the California event we are concerned with here. Grinduro has a format taken from Enduro mountain bike races. The course is approximately 60 miles long, but only 4 short sections are timed. The California edition had almost 1000 takers in 2019.
We will update this post when the 2020 date is announced.Grinduro.com
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