We have received 2020 Yellowstone Park fishing licenses and regulations. All Montana entrances to the Park open Monday, June 1st. This will make it easier to get to the Firehole River rather than going via the south entrance. The Firehole, being the usual early season Park hot spot, is likely to be well attended. But well placed BWO & caddis life cycle patterns, soft hackles (partridge & olive, partridge & amber) will bring action. Look for that action to improve if showers threaten.