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Islomania Dome

not verifiedpermit verified 2026-08-15 Ungraded Unknown flood risk Escalante, UT
Islomania Dome
John Fowler, CC BY 2.0, via Wikimedia Commons

A landmark rather than a descent: RopeWiki files this as a point of interest, and its only beta link resolves to Road Trip Ryan's Volcano / Cosmic Ashtray route in the Red Breaks country north of Hole-in-the-Rock Road.

The listed 5 to 7 hours matches Road Trip Ryan's Old Sheffield Road approach, 7.3 miles round trip, rather than the shorter Harris Wash line. Either way the roads have to be dry, and there is a sandy patch about half a mile short of the trailhead that stops low clearance 2WD; walking that stretch is a legitimate option. Carry every drop of water you plan to drink, there is none out there. Take a GPS and the coordinates: people have walked within a hundred feet of the feature and missed it entirely. If you intend to drop into the bowl, bring a 40 m rope, because getting back out is the part that traps people. Summer is punishing and snow makes the slickrock approach slippery, which leaves fall, spring and dry winter days.

Logistics

ManagerBLM Grand Staircase-Escalante National Monument
PermitMonument wide rule, not a canyon specific finding. BLM requires a free permit for all overnight stays anywhere in Grand Staircase-Escalante, self issued at developed trailheads or at the Escalante, Cannonville, Kanab and Big Water visitor centers. Day use by a private party requires no permit: BLM issues Special Recreation Permits for commercial use, competitive events, organized groups and recreation events, none of which covers a private party descending a canyon. The lottery permits BLM lists alongside the monument, Coyote Buttes North and Paria Canyon, are Vermilion Cliffs units administered from Kanab and do not apply here.
Time5 hr-7 hr
SeasonAny; although summers can be hot; and the terrain slippery with snow on the ground.
Coordinates37.7088, -111.3518

Sources