Little River State Park, State park in Waterbury, Vermont, United States.

Little River State Park occupies 850 acres on the Waterbury Reservoir in Waterbury, Vermont, within Mount Mansfield State Forest. It holds 81 tent and trailer sites, 20 lean-tos and five cabins, plus swimming beaches, a boat launch, a ball field and a nature center. Waterbury Center State Park, a day-use area, lies nearby on the same reservoir.

The area was settled in the early 1800s before becoming a park, and traces of that past remain visible on the land. Old burial grounds and the stone foundations of mills from that era can still be found along some of the hiking trails.

The park runs nature programs where visitors can learn about local wildlife from staff who lead hikes and teach about birds and animals. These activities help people connect with the forest and understand the ecosystem around the reservoir.

The water is good for swimming and you can rent boats if you want to get out on the reservoir. Come between May and October when the park is fully open and all facilities are available, including restrooms with hot showers.

The park holds 81 tent and trailer sites, 20 lean-tos and five cabins on the 850-acre Waterbury Reservoir, and its interpreters run night hikes, campfire programs and amphibian explorations. It sits at about 507 metres in Mount Mansfield State Forest, with slopes rising to 832 metres within 1.4 km.