Lower Courthouse Wash
Courthouse Wash drains into the Colorado River near where the US-191 bridge crosses the Colorado as you drive south into Moab. However, it begins about 11 miles to the northwest near Courthouse Springs. From there, it runs north until it converges with Bartlett Wash, then intersects with US-191 near Mill Canyon Road. From there, it runs southeast until it enters Arches National Park near the Klonzo Trailhead. A short distance later, it merges with Sevenmile Canyon. It continues mostly east, turning south about a mile after intersecting with Arches Scenic Drive. After turning south, it runs for approximately three miles until it drains into the Colorado.
Why the lengthy explanation? Castleton discusses the art at the confluence of Courthouse Wash and the Colorado in a section called Lower Courthouse Wash. He also has a section named Upper Courthouse Wash, which includes photos of some spectacular art. But, as Castleton often does, he vaguely describes the location as "upstream from the previously described Courthouse Wash site." Castleton v1, p.183. The only clue he gives is that the site is probably located on BLM property, which rules out several miles of the wash if he's correct. Castleton also discusses a site in Sevenmile Canyon, but he's describing what's commonly called the "Intestine Man" site which is in South Fork Sevenmile Canyon near UT-313.
Coordinates for the parking lot:
UTM: 622985, 4274098
Decimal degrees: 38.60687, -109.58752
Lat/Long: 38° 36' 24.74", 109° 35' 15.09"
The site:
UTM: 623510, 4274180
Decimal degrees: 38.60753, -109.58149
Lat/Long: 38° 36' 27.13", 109° 34' 53.36"
Maps:
1:100,000 Moab
1:24,000 Moab
Upper Courthouse Wash and Sevenmile Canyon are on 1:24,000 Merimac Butte.


Sean and I both thought the glyph on the far right looked like the Chilis® logo.






















This photo and the next three are close-ups of the previous photo.








All of the previous photos are on the way to this panel. It's phenomenal and well worth the hike to get to it.


A couple more angles. Schaafsma, p.70.




These hard-to-see petroglyphs are at the lower left of the previous photo.


These are at the base of the pictograph panel.


These are to the left of the pictograph panel. Neither of us could tell what they represented because they are so faded.