Join us for a fun slideshow program and learn to recognize birds of prey, including hawks, eagles, and falcons, that fly in the skies above Boulder County. Volunteers will share tips to help you distinguish among raptors by identifying field marks, behavior, location, and time of year. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Take a guided 3-mile walk through time at Pella Crossing as we explore Boulder County’s past, present, and future. Learn how plants, wildlife, people, and climate have shaped this landscape from 1720 to today, and what the next 100 years may bring. Discover connections between ecology and human history while experiencing the park’s diverse habitats. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Join the Boulder Mountainbike Alliance and Boulder County Parks & Open Space for a morning of riding the beginner and kid friendly trails at Heil Valley Ranch. This event will have mini-skills clinics, route suggestions, bike decorating materials, and educational information. This event is recommended for families with kids ages 3 to 10. Free loaner kids' mountain bikes and helmets will be available, or you can bring your own mountain bike and helmet. Guided rides with Boulder Mountainbike Alliance for all ages start at 9:30 and depart every half hour. Come anytime between 9 a.m. to noon for bike decorating and independent exploration of the trails. Children must be accompanied by an adult. Don't forget to stop by the Altona Schoolhouse where volunteers will be on hand to share the school’s history and restoration with visitors. Registration required. Register

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.

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. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Boulder County's mountain communities once had their own railroad system. Discover this historic route and learn how a line originally built for mining evolved over time into a beloved attraction for tourists. Space is limited. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Saturn takes center stage! Learn why this gas giant looks spectacular at opposition and what makes its rings so unforgettable. We’ll talk about the planet’s size, moons, and place in our solar system. 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;}

Step into Colorado’s hard rock mining past with this guided tour of historic sites once buzzing with picks, pulleys, and perseverance. Discover the tools, towns, and larger-than-life characters who shaped the region’s mining boom. Tours include moderate walking and are open to ages 10 and older with an accompanying adult. This tour involves visiting historic mining sites. Due to their nature and history, these sites may contain soil and water contaminated by heavy metals. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Discover Colorado’s hidden wildlife with Nikon Ambassador and conservation photographer Kristi Odom. From prairie grasslands to alpine peaks, Kristi shares captivating stories of pikas, rainbow scarabs, migrating tarantulas, mountain plovers, and the people working to protect Colorado’s biodiversity. With experience guiding in Rocky Mountain National Park and documenting local conservation efforts, she offers fresh insights, inspiring imagery, and practical photography tips. Join us for a celebration of Colorado’s remarkable and often overlooked wildlife. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

This gold-silver telluride mine, located in the Gold Hill Mining District of Boulder County, has a rich history. Placer gold was first discovered in the area in 1859 at Gold Run, whose watershed includes Cash Gulch. The gold-silver telluride veins were identified much later, with the claim staked in 1872. During the program, you’ll learn more about the mine’s history and the mineralogy of its ores. Space is limited. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

More than half of the owl species in the U.S. have been seen in Boulder County. These owls live here during parts of the year, and most will build their nests here. Join volunteer naturalists for an indoor slide program to explore these fascinating and diverse creatures and learn about the adaptations that make them expert hunters. Registration required. Register .tribe-events-c-subscribe-dropdown{display:none;}

Follow us along the foothills of Boulder County as we explore and learn about the critters who live among the pines and rocks. Learn with volunteer naturalists how these animals prepare for winter's challenges and how hibernation is used as a survival strategy. Trails at Heil Valley Ranch have some inclines and rocky areas, but benches are available for sitting and resting. The trails can be slippery when wet; come prepared!Registration required.Register .tribe-events-c-subscribe-dropdown{display:none;}