Join volunteer naturalists to stroll through this higher-elevation open space in the changing landscape of fall. As the trail winds through dark evergreen forest and opens into sunlit meadows, you'll hear stories about the plants and animals that call this place home. We'll walk about three miles round trip, with only short rocky or steeper sections, turning around at a color-splashed aspen grove. You'll receive a mini field guide to inspire future wanderings. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

These fascinating creatures are more than cute little rodents who chew up the grass. This entertaining and lively presentation by volunteer naturalists delves into the ecology, social structure, life cycle, behavior, and language of this keystone species, the pillar of the prairie. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Drop by anytime between 11 a.m. and 2 p.m. to go inside the historic Altona Schoolhouse where students studied and played from 1880 to the World War II era. Volunteers will be on hand to share the school’s history and restoration with visitors. If time allows, you can take part in a game or spelling bee.

Parks and Open Space Career Day invites middle school and high school youth (ages 10 and older) to explore careers in the field of Natural Resources. Through hands-on stations led by various staff and volunteers, participants discover roles in wildlife, ranger services, GIS, stewardship, and more. This event helps youth understand what these careers are all about, engages them in outdoor-focused activities, and provides them with insight into future opportunities available to them in this space.Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}

Have you noticed that there are more moose in the high country than ever before? Join us for a moderate hike at Caribou Ranch to learn about the successful introduction of moose to Colorado. We'll discuss the past, present, and future of moose in Boulder County.Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}

Join us for a special open house at the Assay Office Museum, a surviving structure from the heyday of hard rock mining in the Colorado mountains. Discover how miners once tested ore for valuable metals using assaying. Explore original tools and historical artifacts and hear stories from the mining boom era. Learn about the families who lived and worked in this rugged landscape and helped shape the region's rich mining heritage. This is a must-visit for anyone passionate about mining history, geology, or Colorado history. No registration needed.

The same wild landscape that draws people to Boulder County to live and play also provides mountain lions with everything they need to call it home. Join us on a guided hike to learn more about mountain lion identification, habitat, and what to do in case of a close encounter. This program is great for all ages.Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}

Some birds are seen year-round in Boulder County, some only in summer or winter, and some birds visit only briefly in spring or fall. Learn why birds make seasonal journeys, how they know when and where to go, how they find their way, and what brings them back year after year. Join volunteer naturalists to explore these and other fascinating mysteries surrounding the amazing world of bird migration.Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}

Celebrate Latinx and Hispanic Heritage Month with Boulder County Parks & Open Space. Join a Cultural Resources Specialist for a guided tour of Las Barracas, a historic agricultural labor camp near Longmont. Learn about the Japanese American farmers who operated the farm and the Mexican and Mexican American families who lived and worked here. You'll also hear about ongoing efforts to document and preserve this important place. Location sent upon registration. Space is limited to sign up today! Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Let's celebrate Pride all year long! Open to all LGBTQIA+ people and allies. This inclusive trailhead event allows park users to both stand and sit to watch birds. Spotting scopes and optics will be available to borrow and use. All ages and skill levels are welcome. We will be under the shelter near the parking lot.Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}