page_title: Doyle Peak
hierarchical_section_title: Doyle Peak
caption_attribution_description: English: What remains of the collapsed cabin which was built on the southwest slope near the summit of Doyle Peak in the San Francisco Peaks of Coconino National Forest, Arizona. Taken October 20, 2007.
context_page_description: Doyle Peak is in the San Francisco Peaks of northern Arizona and is the fourth highest peak, but the sixth highest named
  point in the state of Arizona with an elevation of 11,464 feet. Both Aubineau Peak and Rees Peak are higher, but they do not have enough prominence to be considered independent peaks. In spite of the name "Doyle" on modern maps this elevation was known as "Schultz" Peak at least through the 1930s. "Doyle Peak" was traditionally the name of the ridge west of Fremont Peak. The elevation called "Schultz" on modern maps traditionally had no name.
  Hiking Schultz Peak can be somewhat challenging depending on the route used, but it is not difficult to ascend. Care must be taken to
  avoid the scree slopes which can be seen from the south in Flagstaff. These slopes are quite steep and
  slide easily. The peak is most easily scaled by hiking the Weatherford Trail to Schultz Saddle, then following the old and now
  indistinct mule trail to the summit, or by following the ridge from Lockett Meadow. Schultz Peak is not the gently rounded
  mountain it appears to be from Flagstaff but a ridge oriented southwest to northeast. The area of the summit is rather flat and wide
context_section_description: Doyle Peak is in the San Francisco Peaks of northern Arizona and is the fourth highest peak, but the sixth highest named 
  point in the state of Arizona with an elevation of 11,464 feet (3,494 m).  Both Aubineau Peak and Rees Peak are higher, but they do not have enough prominence to be considered independent peaks.  In spite of the name "Doyle" on modern maps this elevation was known as "Schultz" Peak at least through the 1930s.  "Doyle Peak" was traditionally the name of the ridge west of Fremont Peak.  The elevation called "Schultz" on modern maps traditionally had no name.
  Hiking Schultz Peak can be somewhat challenging depending on the route used, but it is not difficult to ascend.  Care must be taken to 
  avoid the scree slopes which can be seen from the south in Flagstaff.  These slopes are quite steep and 
  slide easily.  The peak is most easily scaled by hiking the Weatherford Trail to Schultz Saddle, then following the old and now 
  indistinct mule trail to the summit, or by following the ridge from Lockett Meadow.  Schultz Peak is not the gently rounded 
  mountain it appears to be from Flagstaff but a ridge oriented southwest to northeast.  The area of the summit is rather flat and wide 
  in several spots.
  A small structure on the south side of the summit of Schultz Peak and referred to by some as a shepherd's cabin was actually built by Lowell Observatory in 1927 to house a telescope.  The site was selected by Dr. V. M. Slipher, Director of Lowell Observatory, for a pair of Bristlecone Pine trees oriented in a north-south line so that they could be cut and pressed into service as supports for the Polar Axle of the telescope.  The Polar Axle and telescopes were constructed by the Stanley Sykes of Lowell Observatory, and the cabin housing the telescope was constructed by Ramon Vilma (spelling?), a local stonemason <Personal Communication with Dr. H. L. Giclas>.  The structure had a corrugated metal roof that could be rolled off to expose the telescope for observations.  The Polar Axle was taken by truck on the then-new Weatherford Road to Schultz Saddle, then by mule to the Schultz Peak summit, and the two telescopes used there were hauled up in the same way.  The telescopes were a 12-inch (30 cm) reflector and a 15-inch (38 cm) reflector.  The observing site also had a small dormitory partially cut into the hillside east of the telescope, but only an indistinct depression remains.  From 1927 until 1932 this was the highest astronomical observing site on Planet Earth.  This distinction passed to the Swiss in 1932 when they commissioned a slightly higher observing site on the Jungfrau.  The original purpose of the site was to make spectroscopic observations of planets, stars, and nebulae to exploit the increased atmospheric transmission - especially in ultraviolet and infrared wavelengths - at high altitude.  A similar telescope and roll-off structure was constructed at the Mars Hill campus of Lowell Observatory so that spectroscopic observations made at the two sites could be compared.  The telescope at Mars Hill is still in service and now mounts a 21-inch (53 cm) reflector.  Today it is used by Dr. G. W. Lockwood to collect long-term data on variability of Solar Radiation and it has a fascinating history in its own right <http://www2.lowell.edu/users/wes/index.htm>.  The telescopes and Polar Axle from the Schultz Peak site still exist, and one of the bearing assemblies from the original roll-off roof has been retrieved from Schultz Peak as a possible future museum exhibit.
  Between 1931 and 1933 the Harvard-Cornell Meteor Expedition under the direction of Dr. Ernst Öpik, Dr. Harlow Shapley of Harvard, and Dr. Samuel L. Boothroyd of Cornell used Lowell's Schultz Peak Station as one of its meteor observing sites.  They used the vibrating mirror technique developed by Dr. Öpik and Dr. Boothroyd to measure the velocity of meteors, and they recorded meteor tracks from two locations to compute the altitude of meteors by their parallax.  The second observing site for parallax measurement was originally near Bellmont, AZ, b
caption: The cabin near the summit of Doyle Peak
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