Cosmic Ashtray to Volcano

MODERATE 2 reviews

Cosmic Ashtray to Volcano is a 8.3 mile lightly trafficked out and back trail located near Boulder, Utah that offers scenic views and is rated as moderate. The trail is primarily used for hiking, nature trips, and backpacking and is best used from March until November.

8.3 miles
882 feet
Out & Back



nature trips



no shade

The Cosmic Ashtray is a unique landform is essentially one of the biggest potholes on earth. The hike starts out sandy and soon turns to slick rock, making the trail generally easy to moderate.

2 months ago

This is a cool hike, but beware that it's really dangerous if you don't know what you're doing and aren't prepared with survival supplies. The description of this trail as 'easy to moderate' is wholly inaccurate. First, 4WD is required to get to the trail head, as you will pass over deeply-rutted hills and very uneven slickrock in your vehicle. If you attempt this trail, you MUST have a GPS with you--it is very easy to get lost otherwise, and then exhaust yourself in the alternating sand/slick rock up-and-down. There are no cairns to mark the trail. Do not attempt to go into the ashtray without a rope anchored outside the pit, with someone holding it. Otherwise you could be stuck there for days under direct sun before someone finds you, as this is not a well-trafficked site. Spring and Fall would be best temperature-wise for this hike.

2 months ago

hot, dry, difficult to locate. TAKE GPS, you won't see it until you're on it. do not descend into the ashtray without a rope and company, you may never get out !!!