OSMP stewards the trails of the Flatirons, Chautauqua, and the rest of Boulder’s 46,000-acre open-space system — free volunteer naturalist hikes and a year-round trail-stewardship and restoration program.
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.