Winter is a great time to explore the natural wonders of Boulder County! Join volunteer naturalists to learn about the many wonders of winter and how plants and animals adapt to snow and cold — from the Great Plains to the Continental Divide. 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.