Flash flooding in Larimer County caused the Big Thompson River to rise and flow to increase significantly. Phil McCallum shot this video on a county road just below Glen Haven. | FOX31 KDVR.com

On July 31, 1976, the Big Thompson River experienced a 10,000-year flood event--the deadliest in Colorado history. Overnight, the flood claimed 316 homes, 45 mobile homes, 52 businesses, 438 automobiles, and 143 lives in the narrow canyons east of Estes Park. Hear incredible stories of survival, devastating loss, and remembrance in our 1-hour Colorado Experience special airing Thursday at 7pm, or online now: https://www.pbs.org/video/colorado-experience-big-thompson-flood/ | Rocky Mountain PBS

Need a breath of mountain calm? 💧🏔️ Let the Big Thompson River carry you there. The Big Thompson isn’t just a river — it’s a lifeline for Estes Park and the Front Range. Flowing straight out of Rocky Mountain National Park, it carves a path through rugged canyons and meadows, winding 78 miles before joining the South Platte River. 🌊 Along the way, it nourishes wildlife, powers communities, and gives visitors moments of pure peace. Standing at the river’s edge, you feel it instantly — the soun