The Doane College Arboretum was officially rededicated as Osterhout Arboretum on May 9, 2002. The arboretum honors M. David Osterhout, a 1937 Doane graduate and a longtime college employee who served the college in many capacities, including acting president, treasurer, and senior vice president. Osterhout was also a leader in campus landscaping and plant preservation throughout his tenure at the college.
The 300-acre (1.2 km2) Osterhout Arboretum includes special gardens; several distinctive, historical tree groves; lakes; an outdoor amphitheater; fountains; and wooded nature trails. Doane College has been a partner in the Nebraska Statewide Arboretum since 1979. This network of horticulture sites was established to promote knowledge, appreciation, and conservation of trees and other plants throughout the state.