This 1,450-mile-long river is joined in Utah by the Green & San Juan Rivers
... A 
tributary of the Colorado, the San Juan stretches along the very most... [DOC] [TLE] Rivers - Four Corners SW [PAR] Three major US Rivers start in the Colorado Mountains, The Colorado River, ... 
Farmington NM, where it converges with the San Juan River - 110 Miles long - ... 
1,450 Miles Long .... Green River  Narrative by Rob Webb  Photos - Utah 
History To Go Site  ..... where it joins with it's tributaries the Animas & La Plata 
Rivers.