This is a WAITLIST ticket. Waitlisted participants will be reached out to via email on a first-come, first-served basis the week of the event as spots become available.

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Dig into the geology near the Sky Country trailhead on Cougar Mountain by joining geologist Tom Doe for this 3-mile exploratory hike. Learn about and see examples of what is right underfoot, including the major rock types, glacial history, the clay pit, sinkholes, and the legacy of coal mining in the area (no actual digging will take place).

This will be an interactive hike with stops for observation, discussion and Q&A.

Registration required. No pets allowed.

Due to the popularity of this hike, only two registrants per party will be allowed.

REGISTER

Trailhead: Sky Country Trailhead
Trails: Nike Horse Trail, Cave Hole Trail, Bypass Trail, Fred's Railroad Trail, Clay Pit Rd. Trail, Mineshaft Trail, Old Man's Trail
Distance ~3 miles
Duration: 3 hours
Elevation Gain: 250 ft.

Files
1) Map - geotagged PDF lidar map of the hike. Watch the introductory recording to learn about lidar. Use with the Avenza app on your smartphone (Click to download the map)

2) Geological Field Guide to Hiking In Cougar Mtn. Wildland Regional Park (Click to download)

Cougar Mountain Geology: Underfoot at Sky Country Trailhead 6/27/26

By Issaquah Alps Trails Club

Cougar Mountain Geology: Underfoot at Sky Country Trailhead 6/27/26

Hikes with a Purpose