The Boulder is low and clear with the exception of some thunderstorms that can put a bit of sediment into the lower water below the West Boulder for a short duration from time to time. There is still a bit of hopper action down low but smaller dries that imitate larger mayflies or smaller baetis patterns are productive on top. Size 12-14 hair wing dries dropped with a beadhead can also be effective.
The Month Ahead:
The Boulder sees a few browns that make their way up from the Yellowstone River in the fall. This is a cold mountain river and as we get later into the fall the water temps drop quickly and fishing is best in the afternoons.
Long Term Fishing Forecast:
By the end of October the Boulder gets pretty cold. It can still produce but there will be better late fall options in the area as the big browns running out of reservoirs take top billing.