- Mokelumne Canyon, Amador and Calaveras Counties, California1
- Montana1
- Mount Lola, Nevada County, California1
- Mount Shasta, Siskiyou County, California5
- Mount Vesuvius, Naples, Italy2
- Mouth of Kanab Creek, Coconino County, Arizona1
- Mouth of San Juan River, San Juan County, Utah1
- Mt. Konocti, Lake County, California1
- Mt. Misti, Arequipa, Peru1
- NV-Pe-27 (Medicine Rock), Pershing County, Nevada1
- Naga-ed-Der, Upper Egypt1
- Navajo County, Arizona1
- Near Buena Vista Lake, about 15 miles SE of Buttonwillow, Kern County, California3
- Nevada1
- New Haven, New Haven County, Connecticut1
- New Mexico14
- New York City, New York County, New York1
- North Central California1
- Northern California1
- Northern Peru1