The Conejos River is a tributary of the Rio Grande, approximately 92.5 miles (148.9 km) long,[3] in south-central Colorado in the United States.

It flows briefly northeast, through Platoro Reservoir, then southeast through the Rio Grande National Forest, then east along the New Mexico border through a scenic canyon.

It descends steeply in several areas, including Pinnacle Canyon, a popular destination for whitewater rafting.

Off-limits to white settlement during the New Spain years,[citation needed] the river was the site of early land grants to settlers from the government of Mexico in the 1830s.

The first settlement of 50 families along the river, in the Guadalupe Grant in 1833, was destroyed in an attack by Native Americans.