Carleton College Cowling Arboretum

Cowling Arboretum (or The Arb) is an arboretum of 800 acres (320 ha) adjacent to Carleton College in Northfield, Minnesota. It is located on a natural border between prairie and forest habitat, and in part on the floodplain of the Cannon River, and is open to the public without any fees.

The Arboretum was established by Donald J. Cowling and Harvey E. Stork in the 1920s for education, conservation, and recreation. It is a Minnesota State Game Refuge, with some 10 miles (16 km) of trails, and displays both native and non-native trees and shrubs.