Stage 1 fire restrictions, enacted for unincorporated areas of western Boulder County.

Event Calendar

Crepuscular Wildlife


Join us as dusk descends and witness the magic of crepuscular wildlife! We'll explore the fascinating world of mountain lions, graceful mule deer, booming nighthawks, and dazzling moths as they come alive after dark. Learn how these animals have adapted to thrive in the twilight hours. This program is perfect for nature enthusiasts of all ages!

Registration for most programs begins on the 20th of the month before the event.

Registration required.


Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Event Details

Start dateJuly 20, 2024 8:00 pmEnd dateJuly 20, 2024 10:30 pmCalendarHikes & Events, Parks & Open SpaceGoogle Calendar

Organizer Details



VenueHeil Valley Ranch - Wapiti TrailheadAddress1188 Geer Canyon Rd.CityBoulder

Heil Valley Ranch - Wapiti Trailhead