1. On May 11, 1905, the Casa Grande trading post was established in McKinley County, New Mexico. This trading post was an important site for trade between Navajo and Anglo cultures.

2. In 1933, the Civilian Conservation Corps Camp established in Jicarilla Apache Indian Reservation in New Mexico. This camp provided work opportunities for Native American men during the Great Depression.

3. May 11, 1970, marks a significant day in the University of New Mexico's history, as a group of Black students staged a peaceful sit-in at the university's Student Union building. The protest was organized to demand increased recruitment and support for Black students and faculty members.

4. On May 11, 1995, the Valles Caldera National Preserve was established in New Mexico. This preserve encompasses over 89,000 acres of the Jemez Mountains and includes volcanic features like hot springs, fumaroles, and mud pots.

5. In 2010, a major wildfire broke out in northern New Mexico on May 11. The Las Conchas Fire burned over 156,000 acres of land and destroyed several structures. It was one of the largest fires in New Mexico's history.