The Yellowstone River opened to fishing last Saturday (June 15th). The river is running high & clear, so woolly bugger types and streamer patterns are likely to bring best results. Firehole River continues to offer the best stream fishing in the park with BWO, caddis (including white millers) patterns offering best chances for action. A few PMDs are showing up there. Duck Creek is in fishing shape with streamers being effective. Be aware that mosquitoes are showing up big time with all the park’s standing water, so have that DEET handy.