Cosmic Ashtray via Volcano Trail

HARD 6 reviews

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

8.3 miles
882 feet
Out & Back


nature trips



no shade

The Cosmic Ashtray is a moderate to difficult trail leading to a unique land formation. The hike starts out sandy and soon turns to slick rock leading to the geological wonder. It can be very ho on this unmarked trail. It is not recommended to go into the ashtray/pit alone or without a rope.

29 days ago

Hard hike but loved the reward at the end. It is a must do. Lots and lots of water if hot. We did not need 4wd to get to trailhead. Did it in a Toyota Venza. Took us from 11am to 7pm. Stunning dome! Otherworldly, just do it. Follow GPS path on downloaded map.

3 months ago

Amazing hike! I would say moderate is rather inaccurate as a rating. There is no visible trail, most of it will be done via GPS and looking for landmarks. Lots of rock hopping and deep sand in a few places. If you want to go down into the dome I would definitely recommend bringing a rope, there are stairs cut into the side but they are far from enough to easily climb up on your own for most.

5 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.

6 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 !!!

1 month ago