Mission San Gregorio de Abo, in central New Mexico, is a pueblo ruin and historic Spanish mission dating to the early 1600s. Today, the National Historic Landmark is part of the Salinas Pueblo Missions National Monument.

The Salinas Valley has a rich, complex heritage interwoven with ancient Pueblo culture and early Spanish colonization. This valley is believed to have been occupied as early as the 10th Century by the Mogollon and, later, Ancestral Puebloans (Anasazi). It was an important trade hub between the tribes of the Rio Grande and those on the Western Plains. Pueblo ruins at Abo date to around 1300, a time of great prosperity and cultural growth for the valley people. Mogollon and Ancestral Puebloan traditions blended to form the Tompiro culture. The Tompiro were skilled craftspeople, hunters, builders, and agriculturalists. At its height, Abo Pueblo must have been an impressive, bustling community.

The Spanish first arrived in New Mexico in 1540 when explorer Francisco Vasquez de Coronado led an expedition in search of the rumored seven cities of gold. Instead, he found intricate pueblo communities and the talented, economically sophisticated people who lived there. This initial expedition inspired further forays into the area. In 1598, Juan de Oñate encountered the Salinas Valley and the large Pueblo societies at Abo, Quarai, and Gran Quivira. By then, the area’s people had become one of the most advanced and economically powerful cultures in the American Southwest.

The Pueblo Indians, who had perfected their craft-making, agricultural, and hunting techniques, commanded the Indian trade paths with their abundance of goods. Because of their superior architectural skills, their impressive stone-and-adobe homes dominated the southwestern landscape. The Spanish found Pueblo pottery, farming, and building techniques impressive, and recognizing the value of American Indians’ skilled labor, they established a permanent settlement.

The Spanish quickly implemented the encomienda system, which demanded tribute and forced labor from the area’s Indian inhabitants. The Spanish governor appointed ranking Spanish citizens to protect, educate, and civilize the Indians. In return, the Spanish collected tribute through labor, food, and material goods. Eventually, the Spanish began abusing the system, and tensions grew. Although Franciscan friars tried to help the Pueblo peoples, the church was powerless against the government, and the lucrative system continued.

Conflict also grew from the religious pressure that Franciscan friars placed on the American Indians. The clash of religions made it difficult for the missionaries to convert Pueblo peoples, who were unwilling to give up sacred customs they believed brought good fortune to their communities. The Franciscans attempted to stop the Pueblo people from performing these customs by informing the Indians that their people’s salvation depended on their conversion to Christianity.

Spanish missionaries worked to bring Catholicism to the approximately 1,500 natives living at Abo Pueblo. Fray Francisco Fonte established Mission San Gregorio de Abo around 1621, and by 1629, the prominent San Gregorio de Abo Church was completed. Built of red sandstone, the church used a European-style buttress system that allowed notably tall, thin walls. The church formed the center of mission activity for the next 50 years. In 1641, the pueblo was home to more than 1,600 people.

Franciscan missionaries brought new religious ideas to the area and introduced the people of Abo to new species of domestic animals and plants, different agricultural practices, and Spanish goods. Archaeological and historical research at the site uncovered evidence of corrals and stables for livestock, such as the sheep and goats the mission kept. People used salt and ate a combination of native foods like corn, pumpkin, prickly pear, cholla, juniper, piñon nuts, yucca, amaranth, and turkey eggs, as well as European-introduced foods like grapes, plums, and peaches. The site also yielded Chinese porcelain imported from the Philippines, Mexican Majolica, and olive jar-style ceramics brought north from Mexico, materially connecting Abo to the rest of the Spanish empire.

While the Franciscans likely had good intentions for the people of Abo, cultural clashes eventually led to the failure of the San Gregorio de Abo Mission. Many Tompiro people refused to give up their sacred customs for new Catholic beliefs, especially when a series of droughts, epidemics, and Apache attacks hit the Pueblo starting in the mid-1600s, providing proof to many that Catholicism insulted their Tompiro gods.

By 1672, the Abo Pueblo and its mission had only about 500 residents remaining of what had been a much larger thriving community. Native inhabitants who abandoned Abo are believed to have joined their Piro-speaking relatives along the Rio Grande. In 1678, the pueblo was entirely unoccupied.

For more than 100 years, Abo lay quiet. In 1815, Spanish sheepherders attempted to return to the area, but the Apache Indians pushed them out in 1830. Settlers permanently returned in 1865.

Major excavation and stabilization occurred when the site became a New Mexico State Historic Monument in the 1930s. In 1962, Abo was designated a National Historic Landmark, and in 1980, the ruins became part of the Salinas Pueblo Missions National Monument. The Mission San Gregorio de Abo Church is the only extant example of a thin-walled, buttressed, 17th-century New Mexican church. It is also one of the earliest Spanish ruins in the Southwest. Roughly 40% of the original Pueblo buildings remain as ruins, and many have never been excavated, even though they likely contain important archaeological information about the valley’s ancient peoples.

A visit to the Abo site reveals the intersections between the American Indian and Spanish cultures in the 17th Century that have shaped modern New Mexico.

Access to the ruins and the pueblo is through the Salinas Pueblo Missions National Monument, which offers interpreted tours and self-guided walks through the ruins of Abo, Quarai, and Gran Quivira pueblos and their associated Spanish missions: La Purísima Concepción de Cuarac, San Buenaventura, and San Isidro. Recent stabilization efforts have let visitors walk around and within the old walls of the Abo mission church and explore the largely unexcavated Pueblo structures.

The Salinas Pueblo Missions National Monument is ten miles West of Mountainair, New Mexico, off Route 60. The main visitor center is located on the corner of Ripley and Broadway Streets in Mountainair. Admission is free at all times.

More Information:

Salinas Pueblo Missions National Monument 
PO Box 517
Mountainair, New Mexico 87036-0517
505-847-2585

Compiled & edited by Kathy Alexander/Legends of America, updated September 2026.

Also See:

Gran Quivira Mission & Pueblo

Missions & Presidios of the United States

Quarai Mission & Pueblo

Salinas Pueblo Missions National Monument

Source – National Park Service