Middle Park (elev. 8000 ft/2500 m) is a high basin in the Rocky Mountains of north-central Colorado in the United States. It is located in Grand County, on the southwest slope of Rocky Mountain National Park, approximately 50 miles (80 km) west of (and across the continental divide from) Boulder.
The basin surrounds the headwaters of the Colorado River on the west side of the Front Range. It extends southwestward from the source of the Colorado at Grand Lake, downstream past Granby (the largest community), Hot Sulphur Springs, Parshall and Kremmling. It terminates on the western end roughly where the Colorado passes Gore Canyon at the southern end of the Gore Range. The valley also extends into the lower valleys of side tributaries on the upper Colorado such as the Fraser River, Williams Fork, and Willow Creek. The valley of the Fraser contains the towns of Fraser and Winter Park.
The valley receives its name from being the middle (and smallest) of the three large mountain valleys (i.e., parks) in Colorado on the western side of the Front Range. The other two are North Park and South Park. U.S. Highway 34 traverses the valley from the northeast to the southwest, and connects to U.S. Highway 40 at Granby.