Yellowstone Lake, WY

About Yellowstone Lake

Yellowstone Lake sits at roughly 7,700 feet in the heart of Yellowstone National Park, making it one of the largest high-elevation lakes in North America. Covering well over 100 square miles with deep, cold, exceptionally clear water and a long, jagged shoreline of bays, arms, and rocky points, it is a destination as much for its wild setting as for its fish. Anglers fish it against a backdrop of geyser basins, timbered ridges, and frequent wildlife, and the lake's short, intense open-water season gives every trip a sense of occasion.

The lake is best known as the historic stronghold of the native Yellowstone cutthroat trout, a fish that for generations defined this water and supported one of the most celebrated trout fisheries in the Rockies. It is also, more controversially, home to non-native lake trout (mackinaw), an illegally introduced predator that the Park Service actively works to suppress. That dual identity — a treasured native cutthroat fishery and an aggressive lake trout removal effort — shapes nearly everything about how and why people fish here.

Fish Species

The fishery here is defined by trout, with two species dominating the conversation:

• Yellowstone cutthroat trout — the native standout and the reason most anglers come. These are beautiful, golden-flanked, red-slashed wild trout that cruise shallow flats, drop-offs, and tributary mouths. Decades ago they were astonishingly abundant; their numbers crashed after lake trout arrived, but sustained predator control has helped the population rebuild, and catching a wild Yellowstone cutthroat here is a genuine angling milestone.
• Lake trout (mackinaw) — a deep-dwelling, non-native predator that grows large and lives in the lake's cold depths. Because they prey heavily on cutthroat, the Park encourages and in some cases requires their removal. They are the primary deep-water target for trollers and jiggers.

Yellowstone cutthroat are the prize and the conservation priority; lake trout are the abundant, hard-fighting fish that anglers are asked to keep rather than release. Other native non-game fish exist in the system, but trout are what you fish for.

Best Seasons & Times

Yellowstone Lake has a notably short, weather-driven open-water season, and timing matters more here than on most waters.

• Spring/early summer: Ice typically lingers late at this elevation, so the lake often does not become fully fishable until well into spring or early summer. Once ice is off, cutthroat move shallow to feed and spawn-run into tributaries, and the shoreline, bays, and creek mouths can fish very well. This is prime time for sight-fishing cruising cutthroat.
• Summer: The heart of the season. Cutthroat are active over flats, drop-offs, and points, especially early and late in the day. As surface water warms slightly, lake trout hold deeper, and trollers and jiggers focus on structure and depth to reach them.
• Fall: Cooling water can trigger strong feeding before winter sets in, and the scenery and solitude are at their best. Weather turns quickly, though, and the season closes relatively early compared with lower-elevation waters.
• Winter: The lake freezes and the open-water fishery shuts down entirely; this is not a year-round destination.

Best times of day: Early morning and the last hours of light are generally most productive for cutthroat, particularly in calm conditions. Be prepared for sudden, dangerous wind and cold even in midsummer — this is a big, exposed, high-elevation lake.

Techniques & Baits

Technique depends heavily on which fish you are after, since cutthroat and lake trout occupy very different water.

For Yellowstone cutthroat (shallow and mid-depth):

• Fly anglers do extremely well sight-fishing the shallows and drop-offs with leech, scud, damsel, and small streamer patterns, along with attractor dry flies and emergers when fish are working the surface film.
• Light spinning gear with small spoons, spinners, and inline lures cast to cruising fish and creek mouths is effective where conventional tackle is permitted.
• Focus on bays, tributary inflows, points, and the edges of weedy flats, and move quietly — these fish are spooky in the clear water.

For lake trout (deep water):

• Trolling with downriggers, lead-core, or deep-diving lures along drop-offs and over deeper structure is the standard approach to reach fish holding cold and deep.
• Vertical jigging with heavy jigs and spoons over known deep holding areas accounts for many fish, especially when you locate them on electronics.

Always confirm current Park tackle rules before fishing — there are restrictions designed to protect native fish, and anglers are typically asked to keep lake trout rather than return them.

Access & Launches

Because Yellowstone Lake lies inside Yellowstone National Park, access works differently than on a typical state lake. There is good public shoreline access along the road corridor that follows portions of the lake, and developed areas near the lake offer boat launching, marina services, and guided/rental options during the open season. Boats are popular here and open up the deeper water and far arms, but the lake is huge, cold, and prone to violent wind — safety and a seaworthy craft matter.

Shore and wade anglers can find productive water at bays, points, and tributary mouths reachable from pullouts and trails. Keep in mind this is active grizzly and bison country, so practice proper wildlife awareness and food/bear safety. Park entry fees and seasonal road and facility openings apply, and some areas carry boating permits and inspection requirements — verify current Park access, launch, and aquatic-invasive-species inspection rules before you go rather than relying on any single named ramp.

Regulations & Licenses

Fishing here is governed primarily by Yellowstone National Park regulations rather than standard Wyoming statewide rules, which is an important distinction. A valid Yellowstone National Park fishing permit is required (the Park issues its own permit), and a state fishing license is generally not a substitute inside Park boundaries — always confirm the current permit requirements before fishing.

Expect special conservation rules tailored to protecting native Yellowstone cutthroat trout: native cutthroat are typically catch-and-release, while non-native lake trout are usually required to be kept and not returned to the water as part of the suppression effort. Season dates, gear restrictions (such as non-toxic, non-felt, and barbless requirements), and any slot, size, or bag limits apply and change over time. Because these rules are specific and periodically updated, check the current official Park fishing regulations for exact permit details, open dates, tackle restrictions, and harvest rules before your trip.

Frequently Asked Questions

What kind of fish can you catch in Yellowstone Lake?
The marquee fish is the native Yellowstone cutthroat trout, a wild, red-slashed trout that defines the lake and is generally managed as catch-and-release. The lake also holds non-native lake trout (mackinaw) in its deeper water, which anglers are encouraged or required to keep to protect the cutthroat population.

Do I need a Wyoming fishing license to fish Yellowstone Lake?
Not exactly. Yellowstone Lake is inside Yellowstone National Park, so you need a Yellowstone National Park fishing permit rather than relying on a standard Wyoming state license. Always confirm current permit requirements and Park fishing regulations before you go, since they differ from statewide rules.

When is the best time to fish Yellowstone Lake?
The open-water season is short because of the high elevation. Ice often lingers late, so early summer through fall is the productive window, with cutthroat feeding shallow after ice-off and in fall before freeze-up. Early morning and evening are usually best, and the lake freezes over in winter with no open-water fishing.

What's the best way to catch Yellowstone cutthroat trout there?
Target the shallows, drop-offs, points, bays, and tributary mouths where cutthroat cruise and feed. Fly anglers do well with leeches, scuds, damsels, small streamers, and attractor dries, while light spinning gear with small spoons and spinners also produces. Move quietly and present accurately, because the clear water makes these fish spooky.