register help
This is likely a great time to hike this trail!  Check out "Prefered" months below, keep in mind this is an estimate.

Fossil Mountain, AZ

37 3 0
Guide 3 Triplogs  0 Topics
Rated  Favorite Wish List AZ > Northwest > South Rim
4 of 5 by 2
clicktap icons for details
Difficulty 3.5 of 5
Route Finding 2 of 5
Distance Round Trip 1.6 miles
Trailhead Elevation 6,754 feet
Elevation Gain -338 feet
Accumulated Gain 996 feet
Avg Time Round Trip 2 hours
Kokopelli Seeds 6.58
Interest Off Trail Hiking & Peak
Backpack No
Dogs not allowed
feature photo
Photos Viewed All Mine Following
Inaugural Calculation on Button Tap!
16  2013-04-27 squatpuke
9  2013-04-27 BobP
12  2013-04-27 chumley
Author chumley
author avatar Guides 74
Routes 667
Photos 13,162
Trips 1,416 map ( 10,534 miles )
Age 46 Male Gender
Location Tempe, AZ
Historical Weather
Trailhead Forecast
Expand Map
Preferred   Oct, May, Apr, Sep → Any
Seasons   Late Spring to Autumn
Sun  6:12am - 6:37pm
Official Route
0 Alternative
Geology Nearby
Named place Nearby
Culture Nearby
Under the sea at the peak of the mountain
by chumley

Likely In-Season!
Overview: Fossil Mountain is a small peak about 1 mile east of the South Bass trailhead with plentiful remains of brachiopods, coral, mollusks, sea lillies, worms, and fish teeth forever entombed in the 250 million year old Kaibab Limestone that this peak is carved from. Getting there is an adventure in itself and is not recommended unless you are at the South Bass Trailhead for some other reason. Access to this area requires a minimum 1-hour drive on rough dirt roads, and there is a $25 toll to cross reservation land to get there. But if you are in the neighborhood anyway, it's a great way to spend a couple of hours.

Hike: Begin at Havasupai Point and follow the rim as it roller-coasters toward Fossil Mountain. The terrain is wooded but open, with soft, gravelly footing in many places. The views from the rim are spectacular and make the several steep climbs much more worthwhile. The saddle below Fossil Mountain is not much more than half a mile of hiking from Havasupai Point. You can alternately hike in a drainage a hundred yards or so south of the rim, but it is much less scenic and doesn't really offer any easier access.

At one of the roller-coaster saddles, you cross a narrow throat that offers a sheer drop into Serpentine canyon below. The west side is a gentle slope though, so you are not required to endure any unnecessary exposure. From the saddle below the peak, ascending to the peak is easiest to do directly along the ridge line. Staying to the left offers a more-difficult climb traversing against the fall line. As you go, take the time to look at the ground where numerous examples of fossilized remains are embedded in the limestone. The summit is only 315 feet up from the saddle and it only takes a few minutes to get there.

At the peak, the views of the western canyon are fantastic, from Serpentine Rapid along the Colorado to the northeast, Grand Scenic Divide and Huxley Terrace to the north, the Darwin Plateau and Mount Huethewali to the northwest, and the Esplanade to the west.

Because of the rolling terrain on this hike, you will gain as much elevation on your return to the trailhead as you did getting there. But the trip is no less scenic and viewing it from the reverse angle makes it seem like a different hike.

Access and Camping: As stated above, this is a very remote area and is difficult (and expensive) to get to. Most would agree it isn't "worth it" to make this hike unless you are in the area already. However if you are hiking from the Bass TH and have some time at the beginning or end of your trip, it is a worthy addition. Along the road to Havasupai Point, the historic Signal Hill Lookout tower still stands, though it is no longer open and the stairs to climb it have been removed. Camping is not allowed at Havasupai Point, but there are two designated car-camping sites along the 3-mile road between Bass and Havasupai Point. Both require a backcountry permit (Area SE9).

Caution: Hiking Fossil Mountain is cross-country. There is no trail. There is no source of water, and loose footing along the sheer cliff of the canyon rim can pose a hazard to those unfamiliar with off-trail hiking in the Grand Canyon. This hike should only be attempted by hikers experienced and comfortable with off-trail routes in the Grand Canyon and other desert locales.

Check out the Official Route and Triplogs.

Leave No Trace and +Add a Triplog after your hike to support this local community.

2013-06-03 chumley
    WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.

    Most recent Triplog Reviews
    Fossil Mountain
    rating optionrated 4rated 4rated 4rated 4
    After bagging Huethawali in the morning, we decided on the short and easy trip to Fossil. After driving out to Havasupai Point, we drove back a short distance before parking and heading toward the mountain.

    We stayed right on the ridge, which climbs up and down more than you think, but offers continual stunning views down Serpentine Canyon to the river, with the Grand Scenic Divide to the west.

    It took about 35 minutes to get to the summit, at about .85 miles. We took a short break up top, and spent more time on the way down looking for and admiring the fossil remains we found. This mountain is covered in them!

    This part of the park is not an easy place to get to, and this hike is certainly not worth the effort to come out here on it's own, but if you're out here anyway, I definitely recommend taking the time to make this short trip!
    Fossil Mountain
    rating optionrated 4rated 4rated 4rated 4
    Side trip (from Mt. Heuthawali) with BobP. and Uncle Chumley. Pretty good views and (if I knew anything about fossils) would be a great place to explore for old stuff.

    Chums truck is awesome! Not sure how a caddy would do on this road.

    And for some crazy reason, BobP was 10 minutes late to summit. I think he was busy squeezing out some lyrics to a new song...

    Permit $$

    Map Drive
    High Clearance possible when dry

    To hike
    From the South Bass Trailhead, drive south about 3/10th of a mile and veer left at the fork in the road. Follow this road for about 3 miles to its terminus at Havasupai Point. Park at the point or along the road nearer to Fossil Mountain and begin your hike.
    $17 3L Hydration Bladder
    help comment issue

    end of page marker