Visit the Boulder County Ballot Measures website for information about 2025 ballot measures.

Share your feedback on Boulder County’s website by Friday, Oct. 3. Take the website survey.

Parks & Open Space

Hikes for Seniors: Exploring the Crossings

Pella Crossing 11600 N. 75th St., Longmont, CO

Parks & Open Space Advisory Committee (POSAC)

Commissioners' Hearing Room Downtown County Courthouse, 1325 Pearl Street, 3rd Floor, Boulder, CO, United States

Fun on the Farm: Pollinators

Agricultural Heritage Center 8348 Ute Hwy, Longmont, CO

Bike with a Ranger

Lagerman Agricultural Preserve

The Hidden Worlds of the Shortgrass Prairie

Sandstone Ranch 3001 CO-119, Longmont, CO

Hike with a Ranger

Heil Valley Ranch - Wapiti Trailhead 1188 Geer Canyon Rd., Boulder

Hard Rock Mining Van Tour

Nederland Mining Museum 200 N. Bridge Street, Nederland, CO

High Country Exploration! Kids Program

Mud Lake 2034 County Rd 126, Nederland, CO

Evening at the Museum: Last of the Wild West Cowgirls

Nederland Mining Museum 200 N. Bridge Street, Nederland, CO

Astronomy: The Milky Way

Ron Stewart Preserve at Rabbit Mountain 14950 N. 55th St., Longmont, CO

Canceled: Hammering On the Farm

US 36 Wildlife Crossings Proposal Public Meeting

Ron Stewart Parks & Open Space Building 5201 St Vrain Rd, Longmont, CO