North Wash runs through the center of a vast region of narrow canyons that includes Trachyte Creek to the west and the Dirty Devil River to the east. It flows alongside US 95 from a few miles north of the junction with UT 276 all the way to Lake Powell, and starts to form a canyon just after the junction, where the Navajo sandstone is first exposed. The four slot canyons are found on the northeast side between mileposts 27 and 29; the southwest side is more sheer and has no significant tributaries. Around mile 30 the Navajo is briefly replaced by crumbling ledges of the underlying Kayenta Formation, then the wash deepens quickly as it cuts through the next layer, the cliff-forming Wingate sandstone. Several lengthy branches join here, named canyons being Butler
, Stair, Marinus and Hog
, and these also have narrow, steeply-descending sections in the upper ends where the Navajo layer reappears. Butler Canyon
is most memorable in this respect and has 5 branches of interest, and similar to the North Wash canyons, they are extremely narrow and angle downwards quite a lot, requiring quite strenuous downclimbing and/or rappelling to descend. Another nearby drainage with equally narrow side canyons is Poison Spring Canyon
to the north - all these systems cut into Cedar Point, a large Navajo sandstone mesa.
MapTopoQuest topographic map of North Wash
- Canyon one (Shillelagh, mile 27.4) - the shallowest of the four, this has several forks with fine slot-like sections mixed with more open areas.
- Canyon two (Blarney, mile 27.6) - this has two main branches, one of which becomes quite enclosed and difficult to follow.
- Canyon three (Leprechaun, mile 28.1) - a long tributary with an unusual enclosed approach that narrows abruptly then splits into two main forks, both of which need ropes to explore and are best entered from the top end.
- Canyon four (Sandthrax, mile 28.5) - a comparatively short tributary, but partially flooded and very dark, with long stretches only inches wide but still many yards deep.