Arizona 366 travels from US 191 west through the Coronado
National Forest up to the top of Mt. Graham and the Pinaleño
mountain range. The road was added to the state highway system
in 1961-62.
Arizona 366 is a twisting road, with sharp curves with no
guardrails. The road is quite scenic, but only paved for the
first 21 miles (between miles 114 and 136). The last 7 miles
are gravel, and are closed to vehicles from November 15 to
April 15.
Perspective from Westbound Arizona 366
Distance sign to Columbine Ranger Station (where the
state highway ends) and Riggs Lake. Photo taken November
11, 2007.
This is the first and only reassurance marker on Arizona
366 westbound. Photo taken November 11, 2007.
Trucks above 40 feet are not recommended along Arizona
366. There is a truck turnaround just after this sign.
Photo taken November 11, 2007.
Arizona 366 is subject to daytime closures. This could
be due to the Mt. Graham observatory located atop the
mountain. Photo taken November 11, 2007.
Arizona 366 travels around Cyclone Hill to enter Jacobson
Canyon. Photo taken November 11, 2007.
Arizona 366 is a winding, twisting highway as it climbs
Mt. Graham. This is advance warning of the upcoming curves.
Photo taken November 11, 2007.
Perspective of Arizona 366 as it begins
it's rapid climb up Jacobson Canyon. Photos taken November
11, 2007.
As the road heads further up the sky island, mature
forests become more and more visible. Photo taken November
11, 2007.
Arizona 366 features sharp curves with no guardrails,
such as this one. Photo taken November 11, 2007.
Tall trees are common on the "Sky Island"
of Mt. Graham. Photo taken November 11, 2007.
After reaching the 8500' tall Lady Bug Saddle, Arizona
366 levels out and follows the top of the mountain, with
a much more gradual climb to the Ranger Station, where
the road ends. Photo taken November 11, 2007.
Perspective from Eastbound Arizona 366
There is a downhill grade all the way from Lady Bug
Recreation Area (from 8300 feet down to 2900 feet in 19
miles). Photo taken November 11, 2007.
Distance sign to U.S. Highway 191 and Safford. While
the distance may be short, it's not a fast drive down
the mountain. Photo taken November 11, 2007.
The vistas along Arizona 366 face all the way down to
Arizona 191. This is one of the places where Arizona's
famed clear skies can be seen quite easily. Photo taken
November 11, 2007.
As Arizona 366 descends from Turkey Flat, these panoramas
can be seen along Twilight Creek. Photo taken November
11, 2007.
The bridge over Wet Canyon is a one lane stone bridge.
Photo taken November 11, 2007.
This bridge over Wet Canyon was constructed in 1936
by the CCC. Wet Canyon is a well-preserved riparian habitat,
one of the few remaining in Arizona. Photo taken November
11, 2007.
After crossing Wet Canyon, Arizona 366 enters the Jacobson
Creek drainage. Photo taken November 11, 2007.
While descending along the north side of the canyon,
the vegetation gets less dense and more shrub-driven.
Photo taken November 11, 2007.
The panoramas towards the San Simon Valley are amazing
from the descent of eastbound Arizona 366. Photo taken
November 11, 2007.
After the final twists and turns, Arizona 366 enters
the broad alluvial fan on it's final descent towards U.S.
Highway 191. Photo taken November 11, 2007.
Advance signage for U.S. 191, 1/2 mile. Photo taken
November 11, 2007.
Arizona 366 ends at U.S. Highway
191. Turn left for U.S. 191 north to Safford, or right
for U.S. 191 to Interstate 10. Photo taken November 11,
2007.
There is no end shield for U.S. 191, just this sign
denoting which direction to go to Safford or Willcox.
Photo taken November 11, 2007.
