The trail begins in Foxglenn Park as a concrete trail near the park's entrance on Butler Avenue. Within the park there are several concrete side trails, including one around the perimeter of the park. The main trail leaves the Foxglenn Park at its southwest corner, becomes an aggregate trail, and follows the broad, flat canyon-bottom of the Rio de Flag.
West of Fourth Street, the trail follows a hilly course throughout the forest before coming to an end at Herold Ranch Road. The western portion of the trail is steep at times.
Butler Avenue to Herold Ranch Road
1.9 miles | 3.0 kilometers
Concrete: 16% of the trail (0.3 miles | 0.5 kilometers)
Aggregate: 84% of the trail (1.6 miles | 2.5 kilometers)
Easy grades: 79% of the trail has grades of less than 5%
Moderate grades: 13% of the trail has grades between 5 and 10% (1,300 feet | 396 meters)
Steep grades: 7% of the trail has grades between 10 and 15% (650 feet | 198 meters)
Very steep grades: 1% of the trail has grades of more than 15% (100 feet | 30 meters)