Stage 1 Fire Restrictions, effective Aug. 12, 2025, for unincorporated western Boulder County.

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

Events

City Nature Challenge – Louisville & Lafayette Bioblitz

Louisville Community Park 955 Bella Vista Dr., Louisville

Join volunteer naturalists and Louisville ranger naturalists on a special nature hike to find and report plants and animals around Coal Creek Trail as part of the City Nature Challenge. City Nature Challenge is an international effort for people to find and document plants and wildlife in cities across the globe. It’s a bioblitz-style competition where cities are in a friendly contest with each other to see who can make the most observations of nature, who can find the most species, and who can engage the most people. Meet us at Louisville Community Park (955 Bella Vista Dr.) and bring your camera or smartphone with the iNaturalist app loaded and ready to go! This opportunity is open to folks of all ages. Register for this program on Eventbrite.

Scales on the Trail: Demystifying the Rattlesnake

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

Watch your step! Join volunteer naturalists on a moderate trek through prime rattlesnake habitat and learn about these often misunderstood and feared creatures. Meet at the shelter to share in a discussion about rattlesnake habitat and behavior and learn things you’d never imagine through seeing and feeling. You’ll walk away feeling more comfortable about sharing open space with these scaly friends. Registration for most programs begins on the 20th of the month before the event. Registration required. Register 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.