Outlines procedures for administering the pack, field, and walk tests. These tests were developed as an alternative to the 5-minute step test that had been used to screen candidates for wildland firefighting. The pack test, for workers with arduous duties, requires carrying a 45-pound pack for 3 miles in 45 minutes. The field test, for workers with moderately strenuous duties, requires carrying a 25-pound pack for 2 miles in 30 minutes. The walk test, for workers with light duties, requires walking 1 mile in 16 minutes.