Which "yellow 40" are you looking for?

Yellow 40 starts at the bottom of Boulder Canyon 68 and ends at the top of the Mini Donut Bowl. Along the way, it provides access to several other trails. The trail is generally straightforward, except for one sharp turn near the Donut Bowl featuring unavoidable large rocks. This area appears prone ...
Learn more about Yellow 40

Yellow 40 is located on the far northeast corner of the park. It connects to Overflow Parking 34 at one end and Yellow 41 at the end. This is a non-directional trail so it can be run in either direction. This trail and Yellow 39 almost share the same entrance from Overflow Parking 34.
Learn more about Yellow 40