National Natural Landmarks
Grants Lava Flow
Grants Lava Flow is one of the best examples of recent extrusive volcanism. Located within portions of the El Malpais National Monument and El Malpais National Conservation Area, it is about 32 miles long and 18 miles wide at its widest point. Its gigantic pressure ridges, collapse depression ponds, and lava tubes are outstanding.
Location: Valencia County, NM
Year designated: 1969
Ownership: Federal, Indian Trust (Acoma Pueblo), Private
Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.