The last two days have been in the 70s and the overnight low in Bozeman was in the low 50s. The forecast is for a least a week more of 70 degree weather and moderate overnight lows. Most of the local streams—Gallatin, Yellowstone, Madison, Big Hole and Beaverhead have seen big spikes in flows over the last two days. And, its likely the high-elevation stuff will start its annual journey to the sea. Its a bit of an early start to run-off but bodes well for an earlier start to decent fishing in late June and early July. August and September might be a bit thin though.