Boulder County supports an amazing variety of grasses. The grass family is one of the most important and common plant families, yet grasses are often overlooked because some don’t regard them as very showy. But look closely, and you’ll develop a new appreciation for these beautiful plants! Grasses provide critical food for people and wildlife, prevent soil erosion, and are heroes in the fight against climate change. 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.