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Activities get outside with us

Courses learn outdoor skills

Upcoming Events

Tue, Jun 3, 2025

Boulder Group's New and Prospective Member Night

Join us in person to learn more about the Colorado Mountain Club and find your next great adventure!

Deer Creek Canyon Park
Wed, Jun 4, 2025

Hiking – Deer Creek Canyon Park - Plymouth Mountain

This a pleasant close in hike with nice views. We will take the Meadowlark Trail, then Plymouth Creek trail to Plymouth mountain trail and a nice view point. Then continue on Plymouth mountain trail circling back on the East side . There is a nice variety of terrain including open meadows, scrub oak and shady pine forest areas. Note: the forest fire did not affect this route.

Boulder Rock Club
Wed, Jun 4, 2025

Climb – Boulder Rock Club

Indoor Rock Climb

Ascending Hikes – Boulder Open Space - Royal Arch
Wed, Jun 4, 2025

Ascending Hikes – Boulder Open Space - Royal Arch

This hike to Royal Arch from Chautauqua Park in Boulder, Colorado, is a challenging ~4-mile loop route through steep, rocky terrain and dense forest. As we ascend, the trail offers stunning views of the Flatirons and the city below, culminating in the impressive Royal Arch, a natural rock formation with sweeping vistas of Boulder and the surrounding landscape. This is the second of an Ascending Hikes series.

Peaks X, Y, Z aka Alphabetizer
Wed, Jun 4, 2025

Hiking – Peaks X, Y, Z aka Alphabetizer

Four unique 12ers deep in the Lost Creek Wilderness.

Updates from the Blog

April Incident Report: Pre-existing condition leads to slip & fall

April Incident Report: Pre-existing condition leads to slip & fall

Group Shared Support Admin Roles

Group Shared Support Admin Roles

Hiking Boots on the Ground: Use RIMS to Help Land Managers

Hiking Boots on the Ground: Use RIMS to Help Land Managers

Transform your outdoor adventures into tangible acts of conservation with Colorado Mountain Club's RIMS app.