The Colorado River: Lifeline of the West: The American West’s most iconic river, the Colorado, is also one of the most endangered in the United States. This Nature Conservancy event aims to raise awareness about the river’s plight. Guests will enjoy a screening of activist and filmmaker Peter McBride’s short film Delta Dawn (which chronicled his 2014 journey down the Colorado River as it met with the sea for the first time in two decades), as well as light appetizers from Jax Fish House, Centro Latin Kitchen, and the West End Tavern. A discussion panel on water management solutions, featuring McBride, Taylor Hawes (the Colorado River program director for the Nature Conservancy), and Brad Udall (Colorado State University’s senior water and climate research scientist), rounds out the evening. Tue, 7-9 p.m.; eTown Hall, 1535 Spruce Street, Boulder
Extreme Community Makeover’s Volunteer Media Day: This organization’s mission is to help Denverites improve their homes and neighborhoods. The group meets at a central location and sends volunteers to various sites around the city for projects like landscaping, yard work, and painting. In short, you’ll be making a difference that can be seen immediately. Register to participate here. Thu, 9 a.m.-4 p.m.; Set Free Church, 1001 Perry St.
Building Hope International Charity Dinner: This four-course dinner benefits Hope International, an organization that helps people break the cycle of poverty with loans and saving services. Help them further their mission by attending this fondue dinner, hosted by Jerry Schemmel (announcer for the Colorado Rockies). You’ll enjoy the Melting Pot’s delicious fondues with all sorts of tasty dippers. Tickets are $100 (or $175 for a pair), and also include entry into a raffle for terrific prizes. Thu 6 p.m.; The Melting Pot, 2707 W. Main St., Littleton
Spring Into Service With Jefferson County Open Space: With warm weather finally arriving, Coloradans are ready to hike and bike their favorite trails. Ensure they’re in tip-top condition by joining Jefferson County Open Space on National Trails Day to help with cleanup and repair. You’ll get your hands dirty at White Ranch Park trails that were damaged during 2013’s heavy rain and flooding. This event also features habitat restoration and learning activities for children. Lunch is provided; register to attend here. Sat 8:30-3:30 p.m.; White Ranch Park, 25303 Belcher Hill Road, Golden
A Summer Celebration at Diebolt: Join Sunnyside’s Diebolt Brewing for a beer-filled day in the great outdoors. Attendees will receive two free Diebolt craft brews (try the floral Mariposa Pale Ale or crisp Sunnyside Wheat) and the chance to compete in a corn-hole tournament for the grand prize, a one-month membership to Epic Ryde. Not the competitive type? You’re still eligible to win raffle prizes, including massages and Colorado Wine from Canyon Wind Cellars. Tickets for this celebration are $30 and benefit teacher support and students at Academy 360, a health- and wellness-focused elementary school in Denver. Sun 3-7 p.m.; Diebolt Brewing Company, 3855 Mariposa St.