Know Before You Go
Crow canyon is relatively obscure and remote. It is unlikely you will encounter other visitors. It is on BLM land and signage is reasonably good. A high clearance 4-wheel drive vehicle is recommended, but not essential in dry weather. You should allow four hours for your adventure to the Dinéta.
To reach the petroglyphs, take County Road 4450 east from US 64 (east of Farmington, New Mexico, Aztec, New Mexico, and just east of Blanco, New Mexico) for 19 miles. This is a dirt road which is reasonably well maintained. You will cross Largo Wash at five miles and again at 19 miles. Then turn north (there will be a sign) and drive approximately one mile to the mouth of Crow Canyon.
From there, there are signs to the various petroglyph areas. Most of the petroglyphs are at ground level so no climbing or scampering is involved to see them. The road and the wash may become impassable during or following rain, so be mindful of the weather. You are pretty much out in the middle of nowhere, (20+ miles to the nearest paved road), and there is no cell coverage. Bring water.