Frost Line in New Mexico Frost Line in New Mexico eureka (Structural) (OP) 15 Nov 04 15:23 I am working on a project in Northwest New Mexico. I am looking for the depth of the frost line. Referemces to source material would be appreciated. RE: Frost Line in New Mexico BigH (Geotechnical) 15 Nov 04 16:18 I think Bowles book has frost lines you can estimate from. Remember, the north area of New Mexico has some "mountains" rather than the flat lying areas like in southern NM. As a result, the frost lines will depend on your elevation also - and published frost lines might not be of any help. Might contact Taos' Engineering Department and they might be able to help you.