From Boulder head south on Colorado 93 to highway 170, turn right and continue through village of Eldorado Springs to the state park. Entry fee is required. Park in parking lot near the rest rooms. Hike to the foot bridge and cross bridge, turn to your right to the Streamside Trail.
Viewed from the Streamside Trail in Eldorado Canyon State Park near the footbridge, scene is of trees that have changed to fall colors with South Boulder Creek.