The Boulder is low and the trout are spooky so making longer casts helps to reduce sending trout in the wrong direction. The good news is that fish are in deeper water where they aren’t as nervous. This is a cold fishery so the best fishing has been in the afternoons. Baetis will start to produce in late April but are just showing up.
The Month Ahead:
The Boulder runs off a bit later than the Yellowstone because of the high elevation snowpack and the fishing should be good until then. Both nymphing and dries over the baetis hatch will be productive.
Long Term Fishing Forecast:
The Boulder will become a good option after runoff in the summer months. The colder water also makes it a nice option later in the summer when other fisheries are getting warm.