Tucumcari Mountain is a flat-topped mesa rising abruptly from the plain a few kilometres south of town. From the highway it dominates the southern horizon, a 1,500-metre table-top in red sandstone with juniper and pinon scrub on its lower slopes. It is the geographic feature that named the town.
There is no formal trailhead, but a rough dirt road off Highway 209 leads to the foot of the mesa and from there an unmarked path climbs up the west face in about 90 minutes. The view from the top takes in the whole Llano Estacado and the I-40 corridor stretching east to Texas. Take plenty of water — there is no shade and the summer heat can be punishing.