If you intend to fish Box Canyon, be aware that daytime waterborn recreationists are almost as numerous as those at Mack’s Inn. So for fewer interruptions consider visits scheduled early and late in the day. Do the same with the lower river (Warm River to Chester) but for different reasons. Those reasons are the lower flows and warmer weather bringing on rising water temperatures that make fish less active during mid-day. If you want to fish with company, try the Harriman east part of the river where flavs and brown drakes are making for many visiting fly fishers.