The central streambed of the Peanut Boulders area weaves through a collection of boulders about 50 yards behind (north) the Dark Matter Boulder. The WTF Boulder is most notoriously recognizable by several pebbles epoxied onto its blank-ish east face. To get there, hike between the DM and Nacho boulders heading for the wash; stay left out of the thickest brush. After intersecting the wash, turn right, heading back downstream and scramble down between two boulders entering a small flat, gravel-bottomed room. Alternately follow the wash upstream from DM.