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Iron King Trail

Iron King Trail, Yavapai County, AZ, 4.2 miles

Trail Facts

Hall of Fame
Inducted 2010 by Rails to Trails Conservancy
Length 4.2 mi
Elevation 5010 to 5180 ft
Grade 0.8% average
Shade cover 3%
Primary surface Dirt
Secondary surface Crushed gravel

Activities

E-biking · Biking · Walking · Running · Hiking · Birding · and more

About This Trail

The Iron King Trail follows the first four miles of the old Prescott and Eastern Railroad grade from the Granville neighborhood of Prescott Valley west into the Granite Dells. It starts on Santa Fe Loop Road at the foot of Glassford Hill, crosses open Lonesome Valley grassland on wide dirt and gravel doubletrack, and ends at Point of Rocks, where it meets the Prescott Peavine Trail beside Watson Lake. Rusted railroad cars stand at intervals along the way. The ride is rail-grade easy: a barely noticeable climb west for two miles, a flat run into the boulders, then a short drop to the Peavine junction. Most riders pair it with the Peavine for an out-and-back of ten to twelve miles.

RailTrailWx TIPS

Iron King Trail

Your comfort. Prognosticated.

  • This is an open trail with almost no shade. It crosses Lonesome Valley grassland at the foot of Glassford Hill, and the only relief from the sun is among the boulders of the Granite Dells in the last mile. Plan your start time accordingly in summer.
  • The corridor runs east-northeast to west-southwest across open ground with nothing to break the wind. A southwest wind is a headwind all the way out to the Dells and a tailwind home; an easterly does the reverse.
  • The whole trail sits at about 5,000 feet, so mornings are noticeably cooler than the valley towns below and the sun is strong at midday.
  • The grade climbs gently westward for about the first two miles, roughly 120 feet of net gain by Point of Rocks, then runs flat into the rocks and drops briefly to the Peavine junction. Save a little for the return: you ride the climb back out of the Dells at the end.
  • The surface is dirt and gravel doubletrack. Being open to sun and wind it dries quickly, and the one real bridge on the trail is the old railroad bridge near Point of Rocks; the other two spans sit on flat ground.
  • At Point of Rocks the Prescott Peavine Trail continues south along Watson Lake for another six miles, with a picnic table and a portable toilet at the junction. There are no services along the Iron King itself, so carry what you need from the Santa Fe Loop trailhead.
  • The Town of Prescott Valley posts the trail as open 6 a.m. to 10 p.m., and dogs must be leashed. The trailhead lot on Santa Fe Loop Road at Glassford Hill Road is dirt and free.

-Cory

Trivia

  • The Prescott and Eastern Railroad was incorporated on September 14, 1897, and its 26.4 mile line from Entro to Mayer was completed on September 30, 1898.
  • The rails of the Prescott and Eastern were pulled up entirely in 1949, and pieces of the old roadbed can still be seen along Highway 69 between Dewey and Mayer.
  • The Iron King Mine near Humboldt, the trail's namesake, was discovered in 1880, shipped its first ore in 1903, and produced zinc and lead until its last year of production in 1968.
  • Before the railroad came, Point of Rocks was one of the most feared stretches for wagon trains and stagecoaches, a hiding place for renegades and highwaymen.
  • Point of Rocks later held a cluster of railroad buildings at the junction where the Prescott and Eastern branched off toward Humboldt and Mayer.
  • The granite of the Dells has been radiometrically dated at 1.4 billion years old, and its rounded boulders were shaped by weathering along joints, a process called spheroidal weathering.
  • Glassford Hill, which stands over the eastern trailhead, is a volcano that erupted about 12 million years ago and rises to 6,177 feet.
  • Glassford Hill takes its name from Colonel William Glassford, who in the 1880s helped build a network of 27 mountaintop heliograph stations across Arizona that flashed mirror signals like Morse code.
  • Watson Lake, which the Peavine Trail follows beyond Point of Rocks, was created by damming Granite Creek in 1916.
  • The Iron King and Prescott Peavine trails were inducted together into the Rail-Trail Hall of Fame in 2010.

Climate

Excellent biking days per month, 2011-2025 climatology

In a typical year the Iron King Trail has about 145 to 222 days of excellent weather for popular activities such as hiking, birding, dog walking, walking, e-biking, biking, and running, with April, October, and November the best months.

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Hourly comfort scores for the next 15 days of weather, tuned to your activity and your own thresholds.

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Enjoy the Iron King Trail!

Peak Fall Color Climatology

There is too little deciduous tree cover along the Iron King Trail to measure a peak color window. The trail has 0% deciduous coverage, with the majority being Emory oak.

History

The Prescott and Eastern laid its rails across Lonesome Valley in 1898 to reach the mines of the Bradshaw foothills. Point of Rocks, at the western end of this trail, had been a hiding place for renegades and highwaymen who preyed on wagon trains and stagecoaches. In the 1880s Colonel William Glassford used the bald volcanic hill above the eastern trailhead as one of a chain of heliograph stations that flashed mirror signals across Arizona. The railroad was incorporated on September 14, 1897, under the Santa Fe, Prescott and Phoenix Railway. Grading began at Entro, the junction near Point of Rocks, in March 1898. By the end of September the 26.4 mile line to Mayer was complete. It hauled ore and passengers through Humboldt and Poland Junction to Mayer, and it gave the Iron King Mine at Humboldt its outlet to the smelters. In 1911 the Santa Fe folded the company into its California, Arizona and Santa Fe Railway. The mine kept producing zinc and lead until 1968, but the railroad did not last that long. The rails were pulled up entirely in 1949. The Town of Prescott Valley, working with the rails-to-trails program, opened the first four miles of the grade as the Iron King Trail on July 10, 2004. In 2010 the Iron King and the Prescott Peavine Trail entered the Rail-Trail Hall of Fame together. The town has since built a path along Jasper Parkway that ties the Iron King to the Glassford Summit Trail.

Trailheads

  • Iron King TrailheadMILE 0Directions
  • Granville Dog ParkMILE 0.9Directions

Connects To

Prescott Peavine Trail · Glassford Summit Trail

Managed By

Town of Prescott Valley Parks and Recreation

Further Reading

  • Rails-to-Trails Conservancy (TrailLink) · Iron King Trail
  • MTB Project · Iron King Trail Mountain Bike Trail
  • Prescott LIVING Magazine · Prescott Valley Improvements Expand Access To Glassford Summit, Iron King Trails
  • Wikipedia · Prescott and Eastern Railroad
  • Sharlot Hall Museum · Railways Prompt Fall of the Peavine
  • Arizona Highways · Peavine Trail
  • Wikipedia · Granite Dells
  • Prescott AZ History · #PrescottAZHistory: Glassford Hill's History Included Many Names
  • Western Mining History · Iron King Mine
  • Point of Rocks RV Campground · Prescott Hiking Trails & Parks
  • Kingsnake's Home Den · Iron King Trail
  • Hiking Project · Iron King Trail Hiking Trail

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