SP CRATER

SP CRATER

Rocky Mountain Bee Plants Surround SP Crater

North of Flagstaff

ON THE CRATER RIM

Roughly 71,000 years ago, the death throes of SP Crater volcano rocked the flatlands north of Flagstaff. During SP’s final moments, molten lava oozed from its base onto the surrounding high-desert plains, essentially bleeding the mountain to death. Over the course of its active phase, SP shuttered and quaked, splattering taffy-like ribbons of liquid basalt for miles across the landscape before sputtering out. Today, this extinct cinder cone volcano cuts a jaw-dropping silhouette on the skyline, attracting hikers in search of a challenge.

SP APPROACH

Not for the faint of heart, this “hike” involves a 600-foot, 32-degree climb on loose cinders – tantamount to clambering up a ramp of marbles. Once on top of the crusty rim, a 400-foot-deep internal vent gapes below. Quicksand-like substrate and an extreme slope make venturing into the vent dangerous, so it’s smart to stay on the rim. The 0.75-mile circumference hike around the vent features far-reaching views of the Vermilion Cliffs and Navajo Mountain in Utah. To the north, the 5-mile river of lava that signaled the end of this hill’s active phase flows out in a silent, lithic swan song.

LENGTH: 1.5 miles roundtrip

ELEVATION: 6,400-7,021 feet

RATING: moderate

DOGS: not recommended for dogs

THE INTERNAL VENT

DISTANCE FROM PHOENIX: 185 miles one way (3 hours)

GETTING THERE: From Flagstaff, go 32 miles north on US 89 to just before milepost 446. Turn left (west) onto an unmarked dirt road south of Hank’s Trading Post; you’ll see the flattop cone of SP Crater looming on the horizon. Set your odometer and go 0.5 miles, veering left at the fork. At the 4.8-mile point, go right at the second fork. At the 6-mile point, go right again, continue 0.5 miles, and park at the base of the mountain.

Note: The roads are very rough with deep ruts. A high-clearance vehicle is required. Drive slowly and beware of roaming cattle.

INFO: Arizona State Land Department, 602-542-4631 (general info); 928-774-1425 (Flagstaff office)

MORE PHOTOS: http://www.facebook.com/media/set/?set=a.1695865855227.66234.1795269672&l=df0e47931e&type=1

SP CRATER

SP CRATER

San Francisco Volcanic Field

Of the more than 600 dormant cinder cones that dot the San Francisco Volcanic Field north of Flagstaff, SP Crater stands out among its peers. Just a pup in terms of geological time, SP Crater began erupting roughly 71,000 years ago. Today, its text-book cone-shaped slopes rise nearly 800 feet above the dusty flatlands of the Colorado Plateau. A very steep but short scramble on loose cinders up to the rim reveals a 400-foot-deep internal crater and a wonderland of volcanic features such as lava bombs, squeeze-ups, tiny splatter cones and a 5-mile-long lava flow that issues from the northern base of the mountain. From the rim, breathtaking views stretch all the way to southern Utah, the Grand Canyon and the painted desert. And oh, yeah---"SP" is the euphemism for the cowboy name for this hill: Shit Pot Crater. Use your imagination. HIKE LENGTH: 2.4 miles round-trip, including the hike up the saddle and around the rim RATING: moderate-difficult ELEVATION: 6,400- 7,000 feet GETTING THERE: From Flagstaff, go north on Highway 89 for about 32 miles to milepost 445.9 (just before Hank's Trading Post). Turn left onto an unmarked dirt road. Set your car odometer to zero. At the half-mile point, veer left at the fork and continue for 6 more miles heading toward the obvious, symmetrical cinder cone. At the 6-mile point, hang a right and take the road that leads to the saddle on the SW side of the crater. Those without 4-wheel-drive should park at the base of the saddle and hike up the road. Although there is no official route to the top, paths of use are obvious. NOTE: The access road to the crater is rough and many spur roads can be confusing--rules of thumb: go slow, steer toward the mountain and beware of irate cattle. COOL GEOLOGY LINK ABOUT THIS VOLCANO:

http://geology.com/volcano/sp-crater.shtml