Section “B” of the Green River in Utah begins as the A section ends at Little Hole and ends approximately 8 miles below at Indian Crossing in Brown’s Park. This section of the Green opens up a bit and is characterized by broader riffles and the appearance of side channels and braids. Although this section is all referred to as the B section, it is actually quite different in the upper half and lower half where Red Creek, a tributary that can muddy the entire river enters the Green.
B Section Green River Upper Half
The upper half of the B section is quite similar to the lower half of the A section although the river does open up more and is broader and has fewer rapids. The river here continues to be characterized by large pools that can flow for several hundred yards and small rapids in between. Since the river does open up more in this section, wade fishing becomes easier and more effective.
The fishing in the upper half is very similar to the lower A section although there is less pressure the further you get from little hole and the average size starts to increase. The population of rainbow trout continuously declines and this is primarily brown trout water although there are still rainbow trout for many miles beyond this point. There are also some cutthroat/rainbow hybrids in this section, some of which can get very large. These can actually be some of the more impressive fish in the river both for their incredible beauty and for the size and girth that they can attain.
B Section Green River Lower Half
The lower half of the B section is quite different than the entire river above this point. As Red Creek enters the river on the eastern side, a large rapid is formed from the boulders that have been deposited by the creek over the eons. This is the largest rapid on the entire river from Flaming Gorge Dam to the Colorado border and can be challenging depending on flows. During higher water it is actually quite a bit easier to run as most of the rocks are submerged and it is mostly large waves. It is the lower flows that cause the most challenging conditions as you have to maneuver around multiple large rocks. Red Creek is actually a tiny creek much of the time, but when it rains in the drainages that empty into it, the creek can get quite large and full of dark red silt. When this is happening the river turns to chocolate milk below this point.
The effects of Red Creek below this point change the water below here long after the river is clear. The silt and gravel that is deposited from Red Creek floods creates an entirely different environment with much more gravel and sand bottom and much less moss. The insect composition is quite different as well as a result. There are many more mayflies, stoneflies and caddisflies on the lower B section since these insects like very oxygenated water with a rocky bottom.
The fish population on the lower portion of B section also is much smaller as a result of a reduced food supply. slightly different than the lower half so lows below Flaming Gorge Dam.