Nonetheless, suffice it to say that from Memorial Day weekend through September, and sometimes October, there is good fishing to be had somewhere in the area. If you are not willing to travel outside the Jackson Hole valley proper you do not want to be here during Snake River runoff season. For 2001, however, look for the Snake to perhaps begin runoff in mid-April and end around early June. The Snake opens for trout fishing on April 1. When the cutthroats are chasing streamers you can have some of the best large trout opportunities of the entire season.
Dries are also a possibility if the stones are hatching.
When the fishing turns off however, it really turns off. Weather is about as consistent as the fishing, ranging from balmy spring days to all out winter storms. The locals will be out there, but only the occasional visitor. The Snake River opens for trout fishing on April 1 and closes October 31. Yellowstone opens Memorial Day weekend and usually closes the first Sunday in November, as long as the roads are passable.