From Snowmelt to Splash: How Colorado’s Rivers Come to Life Each Spring

Every spring, the mountains around Aspen transform. As the snowpack melts, Colorado’s rivers swell with energy — bringing the Roaring Fork River roaring back to life. At Thunder River Adventures, this is the most exciting time of year. Here’s how snowmelt shapes our rafting season, what guests can expect, and why spring runoff makes for some of the best whitewater in Colorado.