Why do days grow shorter, longer, warmer, or colder? Join us to explore Earth’s yearly trip around the Sun and how it creates seasons, equinoxes, and solstices. Volunteer naturalists will break it down with clear visuals and everyday examples to help make sense of the year's rhythms. Presentations will be at the picnic shelter, followed by stargazing in the parking area. The Longmont Astronomical Society provides telescopes. Bring a chair or blanket, a light jacket, and a red flashlight, and get ready to enjoy a night under the stars! 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;}

Fall in the high country is a sight to see! Walk with us as we explore how plants, like our pines, spruces, and aspen, prepare for the upcoming chill and snow of winter. Learn with volunteer naturalists about deciduous trees, conifers, and other plant life that live at high altitude. The trails at Caribou Ranch are easy, with some rocks and an incline. Trails can be exposed at times or shady and cool. Come prepared!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;}