Guides/Off-road trails/Colorado
Off-road trail23 midifficulty: difficult

Lead King Basin Loop (Crystal Mill)

RegionColoradoAgencyU.S. Forest ServiceLast verified—
Lead King Basin Loop (Crystal Mill) — off-road trail near Marble, Colorado, Colorado
Photo by John Fowler via Wikimedia Commons, CC BY 2.0
Trail vitals6 facts
Length
23mi
Technical difficulty
Difficult
Direction
Loop
Vehicle
Stock 4WD with high clearance, low range, and aggressive tires. Body damage possible on the upper switchbacks. Not for stock crossovers or AWD vehicles.
Best months
Jul, Aug, Sep
Cell coverage
None on the loop; service in Marble.
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Lead King Basin Loop is a 23-mile rocky 4WD loop above Marble, Colorado, on White River and Grand Mesa Uncompahgre Gunnison National Forests. The route circles through the Crystal townsite, the Crystal Mill, and the Lead King Basin below the Maroon-Snowmass Wilderness boundary. The Crystal Mill, a wooden powerhouse perched on a cliff above the Crystal River, is one of the most photographed structures in Colorado.

Most drivers run the loop in four to six hours. The route opens with snowmelt in mid-July and closes by mid-October. Stock high-clearance 4WD with low range and aggressive tires handles it; the upper switchbacks have rock obstacles where stock vehicles regularly take body damage. The loop is best run counter-clockwise (Crystal first, Lead King basin second).

Hazards

Read before you go

  • Rock obstacles. The climb out of Crystal toward Lead King Basin has a couple of rock ledges where stock vehicles regularly take body damage. Skid plates recommended.
  • High elevation. Lead King Basin sits at 11,300 feet. Watch for altitude effects.
  • Afternoon thunderstorms. Build over the Maroon Bells massif in summer.
  • Limited recovery options. No fuel and no cell. Carry full recovery gear.
  • Crowds at Crystal Mill. Site can be busy; respect signage.

Location

23 mi · Off-road trail

Approx. location 39.071, -107.129

Trail facts

5 fields
AgencyU.S. Forest Service
Nearest townMarble, Colorado
Websitewww.fs.usda.gov/r02/whiteriver
ClosedOct, Nov, Dec, Jan, Feb, Mar, Apr, May, Jun
Approx. location39.071, -107.129

Getting there

Directions

From Carbondale. Take CO-133 south to the Marble turnoff at McClure Pass. Take CR-3 east to Marble. The Lead King loop begins at the east edge of town.

Loop direction. Counter-clockwise (Crystal first) is the recommended direction.

Photos

2 photos

Photos · 2

Field notes

Getting Oriented

Lead King Basin sits above Marble, an old marble-quarry town at the head of the Crystal River drainage south of Carbondale. The loop runs east up the Crystal River past Lizard Lake to Crystal townsite and the Crystal Mill, then climbs north through Lead King Basin and drops back to Marble via the Lost Trail Creek drainage. White River National Forest's Aspen-Sopris Ranger District manages the corridor.

Trail Overview

Approximately 23 miles, loop. The Crystal road from Marble to Crystal Mill is rocky and rough but not severely technical; the climb out of Crystal toward Lead King Basin is the route's technical crux, with a couple of rock obstacles and tight switchbacks. Lead King Basin itself is a mellow climb to about 11,300 feet at the basin floor. The descent back to Marble via the Lost Trail Creek drainage is steep but graded.

Points of Interest

  • Crystal Mill. A wooden powerhouse perched on a cliff above the Crystal River, built in the 1890s. The most photographed Colorado mining structure.
  • Crystal townsite. Privately owned ghost town. Several preserved buildings; the Crystal Club operates seasonally.
  • Lead King Basin. Alpine basin at 11,300 feet below the Maroon-Snowmass Wilderness boundary, with views of Snowmass Peak and the Maroon Bells massif.
  • Lizard Lake. Small alpine lake on the eastern climb out of Marble.
  • Marble town and quarry. The Yule Marble Quarry above Marble produced the marble for the Lincoln Memorial and the Tomb of the Unknown Soldier.

Where to Camp

Dispersed camping is allowed on FS land along the Crystal River and Lost Trail Creek with the standard 16-day stay limit. The Marble area has several developed sites at Bogan Flats Campground (USFS). Dispersed sites in Lead King Basin are limited to a few designated spots; check with the FS for current restrictions.

Tips for a Safe and Enjoyable Trip

  • Run the loop counter-clockwise (Crystal first, Lead King basin second). Reverse direction places the technical climb downhill, which most drivers find harder.
  • The Crystal Mill area has informal photography hours posted; respect signage and stay on the road.
  • Plan to be at Crystal Mill before mid-morning to avoid crowds.
  • The Marble Mill Site Park has interpretive displays on the marble quarry industry. Worth a stop.
  • Carry full recovery gear, a high-lift jack, and a spare tire. Cell service is none.

Frequently asked

Common questions

How difficult is Lead King Basin Loop (Crystal Mill)?
Lead King Basin Loop (Crystal Mill) is rated difficult. The route runs 23 miles.
What kind of vehicle do you need for Lead King Basin Loop (Crystal Mill)?
Stock 4WD with high clearance, low range, and aggressive tires. Body damage possible on the upper switchbacks. Not for stock crossovers or AWD vehicles.
When is the best time to visit Lead King Basin Loop (Crystal Mill)?
The best months are Jul, Aug, Sep. Avoid Oct, Nov, Dec, Jan, Feb, Mar, Apr, May, Jun.
Is there cell service at Lead King Basin Loop (Crystal Mill)?
None on the loop; service in Marble.