What to expect at Lost Lake

Lost Lake sits at 10,700 feet in the Uinta Mountains, roughly 35 miles northeast of Duchesne in the Uinta National Forest. The lake holds native Bonneville cutthroat trout and introduced brook trout, both of which respond to standard fly and spin gear. The water is cold and clear year-round, and the surrounding terrain is steep, forested, and genuinely remote — you will not see crowds here, but you will also not find services, cell coverage, or easy bailout routes.

The lake itself is small, roughly 15 acres, with a maximum depth around 40 feet. The shoreline is rocky and uneven, and the bottom drops off quickly in most places. Cutthroat here run 8 to 14 inches on average, with occasional fish to 16 inches. Brook trout are smaller, typically 6 to 10 inches, but more numerous and more aggressive to flies. The season runs from late June through October, depending on snowmelt and weather.

Key Takeaways

  • Lost Lake requires a high-clearance vehicle to reach the trailhead and a 4-mile hike at elevation to reach the water, making it a full-day commitment.
  • Both cutthroat and brook trout live here; cutthroat are native and larger, while brook trout are more willing to take flies and spinners.
  • Utah fishing licenses are required, and the lake falls under general statewide regulations with no special restrictions or closures.
  • The lake is accessible only from late June through October due to snow and road conditions; check current conditions with the Duchesne Ranger District before driving.
  • No camping, water, or facilities exist at the lake itself; plan to fish as a day trip or camp at a lower-elevation trailhead.

How to reach Lost Lake

The drive from Duchesne takes roughly 90 minutes on a mix of paved and dirt roads. Head north on US-191 toward Altamont, then take Forest Road 144 (also called the Yellowstone Road) northeast toward the Uinta Mountains. The road is passable in a standard sedan during dry conditions, but a high-clearance vehicle is strongly recommended, especially after rain or early in the season when washouts are common. Cell service drops out within 10 miles of Duchesne and does not return until you leave the forest.

The trailhead parking area sits at roughly 9,200 feet. From there, the trail climbs 1,500 feet over 4 miles, gaining elevation steadily through lodgepole pine and spruce-fir forest. The final mile opens into alpine meadow with views of the Uinta crest. The trail is well-marked but rocky and steep in sections. Plan 90 minutes to two hours to reach the lake, depending on fitness and pack weight. The return trip is faster, typically 60 to 90 minutes downhill.

Road access is seasonal. Forest Road 144 typically opens in late June and closes by mid-October, depending on snowfall and maintenance. Call the Duchesne Ranger District at 435-738-2482 before driving to confirm the road is open and passable. Early-season trips (late June and July) may encounter snow patches on the trail above 10,000 feet.

What fish are in Lost Lake and how to catch them

Bonneville cutthroat trout are the native species here and the larger of the two. They average 10 to 12 inches, with some fish reaching 15 or 16 inches. Cutthroat are less aggressive than brook trout and often require more precise presentation. They respond well to small dry flies (size 16 to 20) in the early morning and late evening, and to nymphs fished near the bottom during midday. Spinner patterns in black, olive, or brown also work, particularly in the first hour after sunrise.

Brook trout are smaller (6 to 10 inches average) but far more numerous and willing. They will take almost any small fly — dry, wet, or nymph — and respond reliably to small spinners and spoons. Brook trout are the better choice if you want consistent action, especially if you are new to fly fishing or prefer spin gear. They school in shallow water near the inlet and outlet streams, and along the rocky shoreline in 4 to 8 feet of water.

The lake has no boat access and no rental equipment. Fish from shore or wade carefully in the rocky shallows. The water is cold (typically 45 to 55 degrees Fahrenheit even in August), so wear a wetsuit or waders if you plan to wade. Chest waders are safer than hip waders given the steep drop-off and uneven bottom. Bring a headlamp; the sun sets early at this elevation, and the hike out in darkness is dangerous.

Utah fishing license and regulations

You must carry a valid Utah fishing license. A one-day license costs less than a full-year license and is available online through the Utah Division of Wildlife Resources website or at most sporting goods stores in Duchesne and surrounding towns. Nonresident licenses are available at the same rates as resident licenses. The license is required even if you are fishing with a guide or a family member.

Lost Lake falls under general statewide regulations. The daily limit is four trout of any species combined, with no minimum size restriction. There are no special closures, no fly-only sections, and no catch-and-release-only periods. Bait fishing is allowed. The lake is open to fishing from the opening of general season (typically the second Saturday in June) through October 31, though snow and road conditions usually limit practical access to late June through mid-October.

When to fish Lost Lake

Late June through mid-July is the most reliable window. The road is open, snow has melted from the trail, and the water is beginning to warm from its winter low. Cutthroat and brook trout are active in the shallows during this period, and dry fly fishing is productive in the evening. July and August see warmer water (sometimes reaching 60 degrees Fahrenheit) and more stable weather, but afternoon thunderstorms are common and can arrive with little warning at this elevation.

September and early October offer cooler water, fewer insects, and fewer hikers. Fish tend to be deeper and less active, but the weather is more stable and the scenery is exceptional as aspen and willows turn color. By mid-October, snow often returns to the high country, and the road may close. Plan your trip for July or early September if you want the best combination of access, weather, and fishing.

Avoid the lake in June if possible. The road may still be rough, the trail may have snow patches above 10,000 feet, and the water is cold and low from snowmelt. Fish are less active in cold water, and the hike is harder when sections of trail are still snow-covered.

Gear and preparation for Lost Lake

Bring a 5-weight fly rod or a light spinning rod (5 to 6 feet). For fly fishing, pack a selection of small dry flies (Adams, Parachute Hatch, Elk Hair Caddis in sizes 14 to 18), small nymphs (Pheasant Tail, Hare's Ear in sizes 16 to 18), and a few small streamers (Woolly Bugger in black or olive, size 10 to 12). For spinning, bring small spinners (size 0 to 1) in silver, gold, or black, and a few small spoons.

Wear layers. The temperature at 10,700 feet can swing 30 degrees between morning and afternoon, and wind is common. Bring a rain jacket, a fleece or wool layer, and a hat. Sunscreen and sunglasses are essential — the sun reflects off the water and snow (if present), and the elevation intensifies UV exposure. Bring more water than you think you need; the hike is steep and dehydration happens fast at altitude.

Pack a headlamp with extra batteries, a basic first aid kit, and a map of the area. Cell phones do not work here. Tell someone where you are going and when you expect to return. The hike is not technical, but a twisted ankle or a fall on the rocky trail can become serious quickly when you are 4 miles from the trailhead and alone.

Camping and lodging near Lost Lake

There is no camping at Lost Lake itself, and no facilities of any kind. Most anglers fish as a day trip from Duchesne or from a lower-elevation campground in the Uinta National Forest. Yellowstone Lake Campground sits at 8,500 feet, roughly 15 miles south of the Lost Lake trailhead, and offers 30 sites with water and vault toilets. Sites are first-come, first-served and typically fill on weekends in July and August.

Alternatively, camp at one of the developed campgrounds near Duchesne itself — Starvation Reservoir State Park is 10 miles south of town and offers full hookups and a boat ramp if you want to fish other water on the same trip. Duchesne has a small motel and a few restaurants, but services are limited. Stock up on fuel and food in Roosevelt (30 miles west) or Vernal (50 miles north) before heading into the mountains.

Frequently Asked Questions

Can I reach Lost Lake in a regular sedan?

Technically yes during dry conditions, but a high-clearance vehicle is much safer. Forest Road 144 has washboard sections and occasional ruts that will scrape the undercarriage of a low-slung car. After rain, the road becomes muddy and slippery. If you do not have a high-clearance vehicle, call the Duchesne Ranger District first to ask about current conditions.

Is the hike to Lost Lake difficult?

It is steep and gains 1,500 feet over 4 miles, so it is moderately difficult. Most people in reasonable fitness can complete it in two hours going up and 90 minutes coming down. The trail is well-marked and not technical, but the altitude and the rocky footing slow you down. Start early to give yourself time to fish and hike out before dark.

What if I get caught in a thunderstorm?

Thunderstorms are common in July and August and can develop quickly. Do not fish during lightning. If a storm approaches, move away from the water and seek shelter in the trees. The hike down is safer than staying at the lake. Bring a rain jacket and a headlamp so you can navigate the trail if weather forces you to leave early.

Do I need a guide to fish Lost Lake?

No. The lake is accessible to the public, the trail is marked, and the fishing is straightforward. A guide is not necessary unless you want instruction in fly fishing or local knowledge of where fish are holding on a particular day. Most anglers fish this lake on their own.

What is the best time of day to fish?

Early morning (sunrise to 9 a.m.) and evening (5 p.m. to sunset) are most productive. Midday fishing is slower, especially in July and August when the water warms and fish move deeper. If you are hiking in, plan to arrive by 10 a.m. so you have the evening bite, or hike in the evening before and camp lower to fish the morning.