Question: The Baker–Fancher party suffered casualties at the rest stop on the trail that began near what New Mexico city?

Context paragraphs:
2010 South Darfur clash: On 23 April 2010 a military clash occurred in South Darfur involving a Sudan People's Liberation Army (SPLA) company and another party.  The clash happened in Balballa near to the border with the Bahr al-Ghazal province.  The identity of the other combatant is disputed with the SPLA claiming it to be the North Sudanese Sudan People's Armed Forces (SPAF) whilst the SPAF and tribal sources say that it was Rezeigat nomadic Arab tribesmen that were involved.  A Rezeigat tribal leader has said that 58 tribesmen were killed in the clash and 85 were wounded.  The governor of Bahr al-Ghazal has stated that both sides suffered casualties but no figures for SPLA losses are known.

Old Spanish Trail (trade route): The Old Spanish Trail is a historical trade route that connected the northern New Mexico settlements of (or near) Santa Fe, New Mexico with those of Los Angeles, California and southern California.  Approximately 700 mi long, the trail ran through areas of high mountains, arid deserts, and deep canyons.  It is considered one of the most arduous of all trade routes ever established in the United States.  Explored, in part, by Spanish explorers as early as the late 16th century, the trail saw extensive use by pack trains from about 1830 until the mid-1850s.

El Rancho de las Golondrinas: El Rancho de las Golondrinas (The Ranch of the Swallows), a historic "rancho" and now a living history museum, is strategically located on what was once the "Camino Real", the Royal Road that extended from Mexico City to Santa Fe.  The ranch provided goods for trade and was a place where the caravans that plied the road would stop on their journey coming from or going to Santa Fe.  It was a "paraje", an official rest stop for travelers, and was even mentioned by the great colonial military leader and governor, Don Juan Bautista de Anza, when he stopped here with his expeditionary force in 1780.

Baker–Fancher party: The Baker–Fancher party (also called the Fancher–Baker party, Fancher party, or Baker's Company) was the name used to collectively describe the American western emigrants from four northwestern counties in Arkansas, specifically Marion, Crawford, Carroll, and Johnson counties, who departed Carroll County in April 1857 and "were attacked by the Mormons near the rim of the Great Basin, and about fifty miles from Cedar City, in Utah Territory, and that all of the emigrants, with the exception of 17 children, were then and there massacred and murdered" in the Mountain Meadows massacre.  Sources estimate that between 120 and 140 men, women and children were killed on September 11, 1857, at Mountain Meadows, a rest stop on the Old Spanish Trail, in the Utah Territory.  Some children of up to six years old were taken in by the Mormon families in Southern Utah, presumably because they had been judged to be too young to tell others about the massacre.

Porcupine Rim Trail: The Porcupine Rim Trail, located near Moab, Utah, is a popular mountain biking trail almost as famous as the Slickrock Trail.  This 14.4 mi trail is ridden one way with shuttle service or as a 30.8 mi loop.  The trailhead is located in the Sand Flats Recreation Area about 8 mi past the Slickrock trailhead.  Like the Slickrock Trail, Porcupine Trail was originally created for motorcycles, and they are allowed on the trail.  The trail begins with a double-track climb gaining 900 ft in 4 mi with partially shaded rocky, dirt/sand and slickrock terrain which is rideable in its entirety except for a few small sections.  There is a scenic outlook at the top of the climb which is a common rest stop.

Clines Corners, New Mexico: Clines Corners is an unincorporated community in Torrance County, New Mexico, United States.  Clines Corners is located at the junction of Interstate 40 and U.S. Route 285, 21.6 mi east of Moriarty.  The community was established in 1937 by Roy E. Cline, who built a rest stop at what was then the intersection of U.S. Route 66 and US 285; the rest stop, known as Clines Corners Retail Center, is now over 30000 ft2 in size.

Tricorner Knob: Tricorner Knob is a mountain in the Great Smoky Mountains, located in the Southeastern United States.  It has an elevation of 6,120 feet (1,865 m), with 160 feet (48 m) of clean prominence.  The Appalachian Trail and Balsam Mountain Trail intersect near the mountain's summit, making Tricorner Knob the great crossroads of the Eastern Smokies.  The Tricorner Knob Shelter, which occupies a flat area on the mountain's southern slope, provides a key rest stop for Appalachian Trail thru-hikers.

Siege of Ciudad Rodrigo (1812): In the Siege of Ciudad Rodrigo, (7–20 January 1812) the Viscount Wellington's Anglo-Portuguese Army besieged the city's French garrison under General of Brigade Jean Léonard Barrié.  After two breaches were blasted in the walls by British heavy artillery, the fortress was successfully stormed on the evening of 19 January 1812.  After breaking into the city, British troops went on a rampage for several hours before order was restored.  Wellington's army suffered casualties of about 1,700 men including two generals killed.  Strategically, the fall of the fortress opened the northern gateway into French-dominated Spain from British-held Portugal.  An earlier Siege of Ciudad Rodrigo occurred in 1810 when the French captured the city from Spanish forces.

Chautari: Chautari (चौतारी) is a rest stop usually found along the foot trails of rural Nepal.  They are usually made by piling stones to create a platform and usually have Banyan or Peepal (Ficus religiosa) tree (or both) planted on to provide shade.  The primary aim of a chautari is to provide a brief rest stop to travelers hiking along the trail.  However, in a village, they also provide a place for social gatherings after a day of work.

Sparta Rock House: The Sparta Rock House State Historic Site is a stone building near Sparta, Tennessee, United States, that once served as a rest stop and tollhouse.  Built in the late 1830s, the Rock House catered to traffic along an important wagon road between Knoxville and Nashville, offering badly needed lodging and supplies to travellers who had just crossed (or were about to cross, depending on their direction) the rugged Cumberland Plateau.  The Rock House was added to the National Register of Historic Places in 1973 for its architecture and its historical role as an important rest stop.

Supporting paragraphs: Baker–Fancher party Old Spanish Trail (trade route)
Answer: Santa Fe