OOH! I like fishing the San Juan. Good luck.
I've fished that area North of Pecos. Caught many small trout in a beautiful wide hole about a quarter mile off the road between Tres Lagunas and Tererro.
Actually I've fished the Pecos from just below the headwaters all the way south to Red Bluff, Texas. I've taken trout, bass, carp, gar, blue gill, perch and crappy. Always preferred the Pecos over the Rio Grande. San Juan was too much of a trip as I lived in both Las Vegas and Hobbs. I've been there a few times both New Mexico and Colorado.