Yellowstone Fly Fishing Tips
By Craig Mathews
Angling has a long tradition in Yellowstone, and people come from all over the world to fish the park’s varied and famous waters. Nationally recognized fly fishing guide Craig Mathews recently shared a few tips with us to make the most of angling in Yellowstone—whether you’re an expert or fishing for the first time. Read on for his suggestions for the best spots to cast your line during each month of the park’s fishing season.
Yellowstone is a fly-fishing paradise. Nowhere in the world are there so many public rivers, lakes and streams found in such a small area. Seven varieties of game fish live in the park: brook, brown, cutthroat, lake and rainbow trout, along with grayling and whitefish.
There is fishing for the whole family in the park. Willing brook trout and grayling can be counted on to come to flies for beginning anglers on rivers like the Gardner, and small streams such as Indian-Panther and Straight Creeks, and Grebe Lake. On the other hand, selective brown-rainbow and cutthroat trout are a challenge for serious veteran anglers on the Madison, Lewis, and Lamar Rivers and Slough Creek.
Gateway communities to the park offer guide services and fly shops. Visitors are encouraged to check with these local experts regarding fishing conditions, hatches and stream conditions. First-time visitors to the park might want to spend a day with a knowledgeable guide.
The park’s general fishing season begins in late May, though some park waters don’t open until June 15 or July 15. Each month of Yellowstone’s fly fishing season offers its own style of best fishing.
Late May is when the season opens, on the Saturday of Memorial Day. The first river to clear from snowmelt is the Firehole River, which is often the only river in fishable condition at the start of the season. The Firehole usually offers up great dry-fly fishing during afternoon mayfly and caddis hatches and continues to do so until the end of June.
June offers expanded possibilities, when the best places to fish are the Firehole, Gibbon, and Madison Rivers. Small streams such as Straight, Glen, Indian and others offer fine angling for beginners. The second week of June sees the Gibbon and Madison Rivers clear of snowmelt, and the ice comes off lakes like Yellowstone, Grebe and Trout.
July is when nearly all rivers run clear of snowmelt, and all park waters become fishable. Insect hatches are then at their peak, and this is a favorite time for dry-fly anglers. July and August are our fair-weather months, with the most consistent hatches and favorable stream conditions.
August is the best time for fishing lakes in Yellowstone—particularly backcountry lakes, as the biting flies have thinned out. All rivers will fish well in August, except the Madison and Firehole Rivers, which may warm up too much due to a combined effect of warm daytime temperatures and thermal activity on the Firehole. As aquatic insect emergences wane, grasshoppers, ants, bees and beetles play an important role in Yellowstone trout diet, so now through the end of the season is the time to fish imitations of grasshoppers, bee, ants and beetles.
September is the beginning of Yellowstone’s late season, when only a few hatches remain to bring trout to the surface. Huge Fall Green Drakes will come off now on the Lamar River and Slough and Soda Butte Creeks, as will tiny mayflies like the Blue-Winged Olives and midges. Once September arrives, water temperatures drop and the Madison and Firehole Rivers begin to fish well again, producing excellent dry fly fishing in the late season during caddis, midge and mayfly emergences.
October is the best month to come if you want to catch the large migrating fish in the Madison and Lewis Rivers. As spawning time approaches in late October, you can count on the weather changing to be more like winter. Then, the big trout in Yellowstone become aggressive and very territorial, and they may be taken on patterns imitating baitfish and other large nymph and streamer type flies. The season ends on the first Sunday of November.
Before You Go:
In any month, never fish in Yellowstone without bear spray, rain gear, sun block, sunglasses, insect repellent, and a hat. Know how to use your bear spray, and brush up on bear safety guidelines before you head out.
Learn about Yellowstone fly fishing dates and regulations.
All fees collected for the fishing permits stay in the fishery program in the park. Learn about fees and where to get your permit.
Anyone using a boat or float tube in the park will also need a boating permit.
Learn about the Yellowstone Native Fish Conservation Program.
Photos of Craig and Jackie Mathews courtesy of the Mathews. Other photos courtesy of NPS.