The Fort Stevenson State Park Arboretum is an arboretum located near the campground at Fort Stevenson State Park [438 acres (177 ha)] on the north shore of Lake Sakakawea approximately 3 miles (5 km) south of Garrison, North Dakota.

The arboretum contains over 50 native and non-native trees, shrubs, wildflowers and grasses, including Eleagnus angustifolia, Juniperus scopulorum, Salix exigua, and Ulmus pumila.

• List of botanical gardens in the United States

• "Fort Stevenson State Park". North Dakota Parks and Recreation Department. Retrieved September 9, 2012.
• "(Map of park showing arboretum loop)" (PDF). North Dakota Parks and Recreation Department. Retrieved September 9, 2012.

47°35′38″N 101°25′31″W / 47.59389°N 101.42528°W / 47.59389; -101.42528