They're currently becoming widespread in spots such as the Ski Hill area near Leavenworth and the Echo Ridge trail system in the foothills above Lake Chelan.
A set of races in Echo Ridge north of Chelan will take place Saturday with categories from 14 to 60 miles.
Okanogan-Wenatchee National Forest Public Affairs Officer Robin Demario says there will be hundreds of people on the site for much of the day
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