Trail Overview
Yellow 421 is located near the central area of the park. This is a trail that continues along the bottom of the bluffs parallel to Green 2. This is a non directional trail so you can run it from either direction. Yellow 421 is connected to Green 2 at both ends. And is also connected to Yellow 420 and Yellow 422.
Difficulty
This trail has smaller rock ledges up to 18 inches tall along the way. There are also a few blind corners as you wind along the bottom of the bluff. Since this trail is only one vehicle wide, I would be mindful of people coming from the other direction. The end of this trail is a rock slab to climb over. It does offer quite a bit of traction when dry.