West of Santa Fe and north of Pecos near Terrero, the Pecos River starts with the headwaters in the Pecos Wilderness and runs south towards Pecos along SR63. It is known for its stocked rainbow trout and brown trout. There are several side streams providing cutthroat trout and cut-bows.
There are two canyon stretches of the Pecos River open to fly fishing that are worth checking out. The Box is the upper canyon located downstream of Cowles. The other canyon is from the Willow Creek confluence downstream to Terrero.
Note: When fly fishing in New Mexico, you must have a valid fishing license in your possession at all times. There is a combined daily bag limit of five for brown trout, brook trout, rainbow trout, lake trout, konanee salmon and cutthroat trout (a maximum of two).
Overall, Pecos River is the 2nd most popular fly fishing river of all 13 fly fishing spots in New Mexico.