LOCALITIES VISITED BY OBSERVERS 
63 
Birdseye camped the night of September 3, 1908, on the top of the range at 8,600 
feet, 6 miles east of Luna. 
Sangre de Gristo Range. The southern end of the Rocky Mountains extending 
from the Colorado line south to Glorieta. See Pecos Baldy Peak, Taos Mountains 
and Truchas Peaks [Ligon, June 20-July 19, 1919]. 
San Isidro, Sandoval County. On Jemez Creek, 20 miles northwest of Bernalillo 
and 4 miles down stream from Jemez Pueblo; 5,000 feet, Baileys, September 10-11, 
1906. 
San Juan Mountains, Rio Arriba County. A long high range extending into 
northern New Mexico from Colorado and crossing the boundary about 20 miles 
west of the Rio Grande. The general level of the plateau forming the height of land 
is about 10,000 feet. The range was crossed by the Baileys near Hopewell, and they 
spent September 7-11, 1904, investigating the fauna of the higher slopes. 
San Luis Mountains, Hidalgo County. The highest range crossed by the 
International Boundary; the larger part of the mountains is in Mexico; the highest 
point where they are crossed by the International Boundary is 6,700 feet. The 
mountains end a few miles north of the boundary at San Luis Pass, 5,600 feet, and 
thence northward are called the Animas Mountains. Mearns made extensive col¬ 
lections in these mountains; his main camp on the east side was at San Francisco 
Cannon, 5,900 feet, 5 miles south of Monument No. 63, while his main camp on the 
west side was at San Luis Springs, now known as Lang Ranch, 5,200 feet, on the 
New Mexico side of the boundary at Monument No. 66. From these camps trips 
were made to various parts of the mountains and to the summits during parts of 
June and July, 1892, and August 31 to October 2, 1893. Bailey and Goldman made 
camp also at Lang Ranch, August 10, 1908, and Goldman explored the mountains 
in Chihuahua August 11, up Devils Canyon to 7,200 feet and the next day to the top 
of the range at 8,000 feet; August 16-17 they worked in the foothills of the San Luis 
Valley on the south side of the boundary. 
San Luis Pass, Hidalgo County. Crossed by Bailey August 11, 1908, and by 
Goldman August 19, 1908. 
San Marcial, Socorro County. On the Rio Grande, 25 miles south of Socorro, 
4,500 feet; Abort, November 15 to December 15, 1846, camped near here at a place 
w r hich he calls Valverde. Evermanri and Jenkins, early July, 1887; Loring, January 
24, 1894; Bailey, July 31, 1908. 
San Mateo Mountains, Socorro County. A range composed of tw r o almost 
distinct parts, the northern extending east and west with the middle about 20 miles 
south of Monica Spring, its highest peak, Mount Withington, rising to 10,000 feet. 
The other part of the San Mateo Mountains is a short north and south range rising 
to the same height at the southern end in San Mateo Peak. The northern part of the 
range was explored by Goldman, September 10-11, 1909, from his base camp at 
Monica Spring, whence he ascended to the top of the range by way of Monica Canyon, 
reaching an altitude of 9,800 feet, a mile from Mount Withington. The southern 
part of the range w r as visited by him, October 3-7, 1902, from a base camp in San 
Mateo Canyon, 6,000 feet, and 8 miles from the mouth of the canyon at Ojo Caliente 
on the Rio Alamosa; he climbed San Mateo Peak, October 4 and 5. 
San Mateo Mountains, Valencia County. These so-called San Mateo Moun¬ 
tains are really one enormous extinct volcano, called Mount Taylor, the highest 
point of which is 11,385 feet. Hollister made his base camp at 8,700 feet, 10 miles 
northwest of Seboyeta and collected August 13-17, 1905, from 7,500 to 11,000 feet. 
