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Basalt Trail - Deem Hills, AZ

Guide 35 Triplogs  0 Topics
  3 of 5 
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Difficulty 1 of 5
Route Finding 1 of 5
Distance One Way 0.59 miles
Trailhead Elevation 1,773 feet
Elevation Gain -159 feet
Accumulated Gain 159 feet
Avg Time One Way 30 minutes
Kokopelli Seeds 1.12
Backpack No
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Photos Viewed All Mine Following
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Page 1,  2
Author Barrett
author avatar Guides 14
Routes 9
Photos 1,346
Trips 284 map ( 1,514 miles )
Age 57 Male Gender
Location Phoenix, AZ
Historical Weather
Trailhead Forecast
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Preferred   Feb, Nov, Jan, Mar → 6 AM
Seasons   Autumn to Spring
Sun  5:38am - 7:32pm
Official Route
10 Alternative

It's all about that Bass-alt
by Barrett

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Smack dab in the middle of Deem Hills Recreation Area, the Basalt Trail serves as a connector between several of the longer trails in the park, and does not originate at either of the main trail heads. The first access is from the west via the Deem Hills Park trailhead, which has bathrooms, drinking fountains, and several ramadas, by taking the Circumference Trail 0.87 miles along it's southern path. This will land you roughly in the middle of the Basalt trail. To start at the "trailhead" shown on the map, you can take the Circumference trail's northern path for 2.1 miles. The second access is from the east via the East Trailhead, which has only drinking fountains and a small ramada, by taking the Circumference Trail 0.59 miles. For the purpose of this description, I will use the eastern approach, as it is the quickest way to get to the Basalt.

After an elevation gain of approximately 300 feet along the Circumference Trail, you will arrive at 33.729893N -112.147908W, marking the eastern terminus of the Basalt trail. There you will find a convenient trail marker that shows a trail profile, GPS coordinates, even a scannable QR code that will provide trail information on your smart phone. Follow the arrow right for 0.11 miles until you reach another marker telling you to turn left. For the next 0.1 mile you will be on a combination of the Palisade and Basalt Trails, until you reach another marker where the Palisade Trail departs to the left and you continue on the Basalt proper. The view will open up to the inner basin, with an interesting section of black basalt rocks sitting on an light colored area loaded with Chalcedony, a fine-grained quartz prized by ancient inhabitants of the area that can be shaped into arrowheads, knives and scrapers. After 0.22 miles you will reach a 4 way intersection, with the Circumference trail on your left, Ridgeline straight ahead, and Basalt to your right. Take a right and continue 0.1 mile, to 33.730144N -112.153550W, the western terminus of Basalt at yet another intersection with the Circumference trail.

The vegetation along most of the trail is made up of Creosote, Paloverde, Ocotillo, Brittlebush, Saguaro, and Staghorn Cholla, but the geology is what gave this trail it's name.

Basalt is an igneous rock that in this area was formed by volcanic activity 2-5 million years ago. As the lava cooled, it fractured into the boulders you see covering most of the ground. Originally reddish-brown, the black coating, called desert varnish, is formed in arid climates over thousands of years on exposed rock by a combination of chemical processes and microbes, and is made primarily of manganese.
Another geologic feature that can be seen along this trail is exposed by the displacement of boulders to make the trail. A white crust, called a carbonate skin, is seen on the surface that was below ground. This coating also only forms in arid climates, and is the result of accumulation of usually calcium carbonate attaching to the stone as moisture moves up and evaporates through the soils surface.

While not the most dramatic trail in the park, the Basalt ties everything together and gives the hiker a front row seat to some classic Sonoran Desert geology.

Check out the Official Route and Triplogs.

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2015-05-27 Barrett
  • Deem Hills Map
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    Deem Hills Map

One-Way Notice
This hike is listed as One-Way.

When hiking several trails on a single "hike", log it with a generic name that describes the hike. Then link the trails traveled, check out the example.
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.

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Map Drive
Paved - Car Okay

To hike
To access the Deem Hills Park west trailhead, exit I-17 North at Happy Valley. Head west 2.2 miles to Stetson Valley Parkway, turn right (north). Drive .3 miles to Deem Hills Parkway, turn right and proceed .5 miles. Park will be on your right.
To access the east trailhead, exit I-17 North at Happy Valley. Head west .9 miles to 35th Ave, turn right and head north. In 1.5 miles, it will twist and turn, becoming first Pocono Way, then 33rd Avenue. When you reach Pinnacle Vista, turn left and head west .7 miles to 39th Avenue, where you will turn right and head north .1 miles to the trailhead on your left.
page created by joebartels on May 27 2015 9:17 pm
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