Its total length is approximately 36.253 miles (58.344 km).

NM 187 begins at NM 26 in Hatch and starts traveling northward.

It then intersects Interstate 25 (I-25) and U.S. Route 85 (US-85) by Caballo Lake.

It then intersects NM 152 in Hillsboro.

Media related to New Mexico State Road 187 at Wikimedia Commons