Gore Canyon, Canyon along Colorado River near Kremmling, United States.

Gore Canyon is a 3-mile (4.8 km) gorge on the upper Colorado River in southwestern Grand County, Colorado, where the river drops from about 7,300 to 7,000 feet between walls rising roughly 1,000 feet on either side. It marks the southwestern end of the Middle Park basin, southwest of Kremmling.

The Union Pacific Railroad's Moffat Tunnel Subdivision was built through Gore Canyon despite the short length of the gorge, an undertaking considered a monumental engineering achievement in its day. The line remains in use, and the California Zephyr passenger train still runs through the canyon.

The Gore Canyon Whitewater Festival is held every year on the third Saturday of August and also hosts the US National White Water Rafting Championship. The canyon was first rafted in the 1970s and is now run commercially by Liquid Descent and Downstream Adventures.

You can see the canyon from the Colorado River Headwaters National Scenic Byway, which runs along the southern rim and provides viewing access. Stop at pullouts along the route to take in the full scale of the landscape.

In 2009, Colorado Parks and Wildlife released a small herd of bighorn sheep in the canyon to reinforce an existing herd that had declined through competition with domestic animals, hunting and disease. Pronghorn and bald eagles also live here, and the Colorado River holds several kinds of trout.