Guided walks, group hikes, and volunteer trail days.
Colorado Mountain Club — Boulder Group
Recurring early-morning hike + coffee series · volunteer-led, no charge
Boulder-area trailheads (see trip calendar)
One of several regular Boulder Group series (alongside Hiker Happy Hour and the beginner Ascending Hike Series). Dates and trailheads are posted on the CMC trip calendar; sign-up usually required.
Colorado Mountain Club — Boulder Group
Recurring after-work social hikes · volunteer-led, no charge
Boulder-area trailheads (see trip calendar)
After-work social hikes from the Boulder Group; specific dates/times on the trip calendar.
City of Boulder Open Space & Mountain Parks
Free interpretive hikes on Boulder open space · changing dates
OSMP trailheads (Chautauqua, NCAR & others)
Naturalist-led interpretive hikes through the Flatirons open-space system; dates rotate — check the OSMP program calendar.
City of Boulder Open Space & Mountain Parks
Recurring volunteer trail-building & restoration projects
OSMP project sites around Boulder
Hands-on trail work, restoration, and forestry projects; scheduled per project on the OSMP volunteer calendar.
Wildlands Restoration Volunteers
Single-day & weekend volunteer projects across the Front Range · seasonal
Project sites around Boulder County & beyond
Trail building, habitat and river restoration — 150+ projects a year, from single-day events to weekend wilderness work. Register per project.
200+ trips a year · hiking, backpacking, kayaking, climbing & fly fishing
CU Boulder Recreation Center
CU’s outdoor program; primarily for students but a model of beginner-focused programming. Browse the trips calendar for current offerings.