The Navajo are the largest Native American Tribe in the United States with a total population of approximately 250,000 people. EFM administers a work on the Navajo reservation near Four Corners in Arizona. It was begun by Rocky Mountain Yearly Meeting in 1952 and turned over to EFM in 1991. There are four Friends churches there.

Numerous Friends have served there over the years. The most recent career missionaries were Mel and Sandy Harrold. Currently Mike and Norma Johnson are serving as short term missionaries in Rough Rock, and plan to complete their term by September 1, 2007. Joe and Tina Swan have been accepted as candidates to serve at Rough Rock full time. They are currently raising their support.