The canyon section of Boulder Creek is a great place to find solitude for a day fly fishing.  There are miles of fishable water and all of it holds eager brown and rainbow trout with the occasional brook trout.  There are some brook trout to be found as well but they are few and far between.  Dry flies and nymphs work the best on this section and fish are eager to eat a variety of insects most times.  Matching the hatch or using a bug seine will help you find the flies needed to catch a bunch of fish on this section. You also have a chance to catch a grayling up above Barker Reservoir in the town of Nederland along with more chances at brook trout. Above Nederland is nearly all private, but 90% of the canyon below Barker Reservoir is public. Known private spots are marked on the map, but are not exact, so watch for the private signs and fish the miles of public water available.

Access is easy and any pull off provides access off the road.  If the water is murky, try fishing above boulder falls as most of the water comes in from there and getting above the falls reduces the flows and adds clarity.