Guides/Overland routes/Idaho
Overland route18 midifficulty: easy

City of Rocks National Reserve

RegionIdahoAgencyNational Park Service, Idaho State ParksLast verified—
City of Rocks National Reserve — overland route near Almo, Idaho, Idaho
Wallace Keck / NPS (Public Domain)
Trail vitals6 facts
Length
18mi
Technical difficulty
Easy
Direction
Out and back
Vehicle
Standard high-clearance vehicle in dry conditions; the gravel reserve roads handle a 2WD car when dry but turn slick after rain.
Best months
May, Jun, Jul, Aug, Sep, Oct
Cell coverage
None inside the reserve; service returns near Almo.
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City of Rocks National Reserve protects a granite-spire landscape in south-central Idaho, two miles north of the Utah border. The National Park Service and Idaho Department of Parks and Recreation co-manage the 14,407-acre reserve, which Congress designated in 1988. The granite spires include the 28-million-year-old Almo pluton and 2.5-billion-year-old Green Creek Complex outcrops, some of the oldest exposed rock in North America.

The reserve has roughly 18 miles of graded gravel and dirt roads, plus dispersed camping at 64 designated sites. Almo, a small town a mile east, has the visitor center, a general store, and Castle Rocks State Park nearby. Climbing access is the dominant draw — the reserve hosts more than 1,000 traditional and bolt-protected routes — but the road system makes it equally relevant as a scenic drive and base camp.

Hazards

Read before you go

  • Heat in summer. The reserve sits at 5,500 feet. Summer afternoon temperatures top 90°F.
  • Lightning. Granite spires draw lightning. Get off rock and into a vehicle when storms develop.
  • Limited water. Outside the visitor center, no potable water in the reserve.
  • Soft, sandy roads near the south entrance. Air down or skip in low-clearance vehicles.
  • Climbing hazards. Loose rock and routefinding errors are documented hazards. Pick up a current guidebook.

Location

18 mi · Overland route

Approx. location 42.073, -113.705

Trail facts

5 fields
AgencyNational Park Service, Idaho State Parks
Nearest townAlmo, Idaho
Websitewww.nps.gov/ciro
ClosedDec, Jan, Feb
Approx. location42.073, -113.705

Getting there

Directions

From Interstate 84 (north approach). Take Exit 216 at Declo, follow Idaho 77 south through Albion to Connor Junction, then continue south on Birch Creek Road to Almo. Roughly 50 miles from I-84.

From Burley (east approach). Take Idaho 77 / 81 south through Oakley to Almo via Birch Creek Road.

Photos

2 photos

Photos · 2

Field notes

Getting Oriented

The reserve sits in the Albion Mountains in Cassia County, accessible from Interstate 84 via Albion or from Burley via Idaho 77. The visitor center is in Almo. Once inside the reserve, the main road follows the historic California Trail corridor; emigrants left axle-grease inscriptions on rock faces in the 1840s and 1850s, still visible at Camp Rock.

Trail Overview

Eighteen miles of graded gravel and dirt within the reserve, plus connecting paved approaches from Albion or Burley. The reserve roads accommodate stock vehicles in dry conditions; soft, sandy stretches near the south entrance benefit from 4WD. Drive time within the reserve is one to two hours including stops at major formations.

Points of Interest

  • Almo Visitor Center. Maps, interpretive exhibits, and ranger contact in Almo.
  • Camp Rock. Granite face with 1840s emigrant inscriptions in axle grease, intact and protected.
  • Twin Sisters. Paired granite spires on the western side of the reserve, a recognizable landmark from the California Trail.
  • Bath Rock. Bowl-shaped formation with a small natural water catchment historically used as a wash station.
  • Morning Glory Spire. Climber's classic; a clean granite spire with multiple routes.
  • Castle Rocks State Park. Adjacent state park with separate granite formations, more developed camping, and lodging at Castle Rocks Inn.

Where to Camp

The reserve has 64 dispersed camping sites with vault toilets and fire rings. Reservations through Recreation.gov fill quickly during climbing season (April through October). Castle Rocks State Park has additional sites with hookups. Almo has a private RV park.

Tips for a Safe and Enjoyable Trip

  • The Almo Visitor Center has the only potable water within ten miles. Fill up there.
  • Climbing season runs March through November; summer afternoons get hot at 5,500 feet.
  • The reserve roads are gated and closed at times in winter for snow.
  • Dogs are allowed on roads and in campgrounds on leash. Climbers should not bring pets to crags.
  • Combine with Castle Rocks State Park for a longer visit; the two units share Almo as a base.

Frequently asked

Common questions

How difficult is City of Rocks National Reserve?
City of Rocks National Reserve is rated easy. The route runs 18 miles.
What kind of vehicle do you need for City of Rocks National Reserve?
Standard high-clearance vehicle in dry conditions; the gravel reserve roads handle a 2WD car when dry but turn slick after rain.
When is the best time to visit City of Rocks National Reserve?
The best months are May, Jun, Jul, Aug, Sep, Oct. Avoid Dec, Jan, Feb.
Is there cell service at City of Rocks National Reserve?
None inside the reserve; service returns near Almo.