Utah Lake is the easiest big ecosystem in the state to show a child. It is about a 12-minute drive from downtown Provo to Utah Lake State Park (an OSRM estimate, without traffic), it has a fish found nowhere else on Earth, it lost and is slowly getting back its underwater plants, and it has a villain with a clear backstory. This guide answers the questions kids ask, in roughly the order they ask them, with places to go and see each answer.
All the facts here come from the agencies that run the lake: the Utah Lake Authority, the June Sucker Recovery Implementation Program, the Utah Division of Wildlife Resources and the Provo River Delta Restoration Project.
"Why is the water brown?"
It is not dirt, mostly. The Utah Lake Authority's explanation is chalk. The mountains around the lake, especially the ones to the east, are mostly limestone, which contains calcium carbonate, the same mineral as blackboard chalk. Rain and snowmelt carry it down into the lake, where it builds up and makes the water look milky.
Two things stir it up even more. Wind makes waves on a lake that is very shallow (the DWR puts its average depth at about 9.8 feet), and big carp root through the muddy bottom looking for food.
The authority makes a point kids find surprising: the murkiness can help. Cloudy water lets less sunlight in, and sunlight is what harmful algae need to grow.
Try this: fill a clear jar with lake water at the shore, let it sit overnight, and look at how much settles.
"What lived here first?"
Fish, mostly, and people who ate them. The June Sucker Recovery Implementation Program says Utah Lake was once home to 13 native fish species. Today only a few of the originals are left, including the June sucker and the Utah sucker. The program's site also counts the Utah chub as surviving.
The Fremont people lived near the lake more than 1,000 years ago and depended on its native fish. Later the Ute people, trappers and the pioneers who arrived in the 1850s all relied on it too. The program's history says settlers overfished the lake during spawning season in 1855 and 1856, then brought in other fish to replace what they had taken.
For the full human story of the lake, see our Utah Lake history, which covers the steamboats and resorts as well as the fish.
Meet the June sucker
The June sucker is the lake's most important fish, and it lives only in Utah Lake and the lower parts of the rivers that flow into it.
Its comeback, in numbers:
| Year | What happened |
|---|---|
| 1800s | Millions of June sucker in the lake |
| 1986 | Fewer than 1,000 left; listed as endangered in April |
| 1999 | Nine organizations sign on to a recovery program |
| 2021 | Moved from "endangered" to "threatened" on February 3 |
How it grows up. When a June sucker is five or six years old, it swims up a river, mostly the Provo River, to lay eggs in May and June. The eggs hatch in about a week. The tiny larvae drift back down toward the lake, and that is the dangerous part: the recovery program says good nursery habitat has been missing, so nearly all of the babies were eaten or starved in their first few weeks. Scientists call this the "recruitment bottleneck."
The fix has two halves. Hatcheries raise young June suckers until they are big enough not to be eaten, then release them. And the river mouth itself was rebuilt (see the Provo River Delta below) so wild babies have shallow, plant-filled places to hide.
Why scientists care so much about one fish. The June sucker is an indicator species. The program describes it as an early warning system: when June suckers struggle, something is wrong with the whole lake.
Try this: if you think you have seen one, the program has an online form to submit your sighting.
The carp: how the villain got here
Common carp were brought to Utah Lake in the 1880s as a food fish, the Utah Lake Authority says, to replace native fish that were disappearing. It went badly.
Carp feed by rooting through the bottom. In doing that, they tore out the underwater plants on the lake floor and the pondweed near the surface, which were exactly the hiding places young native fish needed. Carp also grow and reproduce faster than June suckers. By the early 2000s, carp made up more than 90 percent of the weight of all the fish in the lake.
The great carp removal. In 2009 and 2010 the recovery program began removing carp on a huge scale with commercial fishermen. Winter turned out to be the best time, because carp gather under the ice, and crews pulled giant nets under the frozen lake. The Utah Lake Authority now says more than 35 million pounds of carp have been removed. After the intensive years ended in 2018, the yearly target dropped to about 1 million pounds to keep numbers low.
Did it work? The recovery program reports a 78 percent drop in carp density since 2012, and says underwater plants are coming back in parts of the lake, along with clearer water and more habitat for fish and birds.
A 2010 account on the Utah Lake Authority's site describes one winter haul in Goshen Bay: biologists sorted the catch, kissed the one June sucker in the net and slid it back through the ice.
Kids can help. The Utah Lake Authority's Great Carp Hunt is a spring fishing tournament in which teams of up to five bring in carp for a bounty: $3 per carp in 2026, with a grand prize for the team that catches the most. Team members 11 and under are free; those 12 and older pay a one-time season fee and need a Utah fishing license. The 2026 dates were Saturdays from April 11 to June 13 at the American Fork Marina, Utah Lake State Park and Lincoln Beach Marina. In 2025, the authority says, teams removed 4,686 carp.
The new villain: northern pike
Northern pike showed up in Utah Lake around 2010 after someone put them there illegally. The recovery program explains why that is a problem: pike have big mouths and can eat fish that are larger than other predators can, including the young June suckers that hatcheries release at "safe" sizes. They grow fast and like the same shallow, weedy river mouths June suckers use.
That is why Utah has an unusual rule for Utah Lake: any untagged pike you catch must be killed, not released. If you catch a tagged pike, the DWR asks you to release it and report the tag number, date and location to its Central Region office at 801-491-5658.
Birds: 226 kinds and counting
The Utah Lake Authority counts 226 bird species in the lake's wetlands, along with 49 kinds of mammals, 16 kinds of amphibians and reptiles and 18 kinds of fish. It singles out the American white pelican, "one of the world's largest birds," for its group fishing.
Where to look:
- The Provo River Delta wildlife viewing tower, on the Delta/Skipper Bay Trail at the west end of Provo. Our birdwatching at Utah Lake and the Provo River Delta guide explains how to get there and which agency runs which part.
- The spots a veteran birder named to the Utah Lake Authority: the Spanish Fork and Hobble Creek deltas, Lincoln Beach, both sides of Provo Bay and the Provo Airport dike.
- Bird Island, a low island a couple of miles north of Lincoln Beach. When the authority's staff motored past it in 2012, they found "hundreds of birds making all sorts of noise." It is only reachable by boat; look from a distance.
Best seasons: spring and fall migration, the birder said, and anytime mudflats are exposed.
A real science project, nearby. Since 2017, BYU students and wildlife biologists have surveyed birds at 22 sites around the Provo River Delta to see how the new wetland changed things. The delta project reports the restored area is drawing more kinds of waterbirds, ducks, gulls and shorebirds.
For teachers and homeschoolers: the Utah Lake Authority publishes a free "Birds of Utah Lake" lesson plan with a list and pictures of 30 common birds and a list of about 200 birds found in Utah County.
The Provo River Delta: a river mouth rebuilt for a fish
Before the project, the last mile and a half of the Provo River ran in a deep, straight channel between dikes. Baby June suckers washed out into open lake water with nowhere to hide. The Provo River Delta Restoration Project rebuilt the river's mouth as a shallow, spreading wetland so they would have cover.
- Construction started in March 2020 and was mostly finished in the delta in 2024.
- The project was estimated at about $51 million when construction began.
- It added a paved trail, a trailhead, the wildlife viewing tower, parking and non-motorized boat ramps.
- In 2026, crews added fishing platforms and ramps on the Old Provo Channel, and the DWR stocked it with trout. The channel trail was closed for repaving until October 31, 2026.
No motorized boats are ever allowed in the delta. Our Provo River Delta update has the latest on what is open.
Bugs: the food chain and the itch
The good bugs. Algae are not all bad, the Utah Lake Authority says: they feed the insects that fish rely on to survive. It is only when algae grow thick, or when toxic blue-green algae bloom, that they become a problem. Our algal bloom guide explains the advisories and how to check before a visit; keep kids and dogs out of water with visible scum.
The itchy bugs. In summer, the DWR warns that mosquito swarms at dusk can be overwhelming along parts of the shoreline. The Utah County Health Department's Mosquito Abatement District, the only public mosquito program in the county, told the Daily Herald in June 2026 that it watches more than 3,000 mapped breeding sites, runs 36 traps baited with carbon dioxide, and uses drones to drop larvicide that kills mosquito larvae in the water. The delta project also pays for extra mosquito monitoring nearby.
Why it matters: mosquitoes can carry West Nile virus, and the county recorded 16 human cases in 2025, the district's director said. Visit in the morning or bring repellent for evening walks.
Try this: take a white plastic tub and a kitchen strainer to a calm edge of the delta and see what small creatures you can scoop up, then let them go.
Things to do with kids, by season
| Season | What to do |
|---|---|
| Spring | Great Carp Hunt Saturdays; look for June suckers heading upriver in May and June; bird migration |
| Summer | Delta tower and trail in the morning; check algae advisories before wading |
| Fall | Bird migration; fourth-grade field trips in mid-September |
| Winter | Bald eagles and waterfowl; ice fishing from marina docks (see our winter Utah Lake guide) |
The Utah Lake Authority's staff have said bald eagles are popular to photograph near Utah Lake State Park in winter. For winter safety on the ice, read our Utah Lake in winter guide first.
For fourth graders: the Utah Lake Authority runs free field trips for fourth-grade classes in the Alpine, Nebo and Provo school districts, with stations on the lake's science and history plus sailing and fishing. Spring trips are at Utah Lake State Park in late April and early May; fall trips are at the Saratoga Springs marina in mid-September. Teachers apply after teaching the authority's free lesson plans, and the authority reimburses up to $200 per school for buses.
If your kids fish: start at a pond. Our kid-friendly fishing ponds guide lists the community fisheries. If you keep fish from Utah Lake, Utah's current advisory says channel catfish should be limited to two 6-ounce servings a month for adults and children 6 to 16, and not eaten at all by children under 6 or by pregnant or nursing women. (A Utah Lake Authority FAQ page lists a broader older advisory; we went by the state's current list.)
On a cold or rainy day: BYU's free Bean Life Science Museum, Provo's natural history collection, is a good indoor follow-up.
Frequently Asked Questions
Why is Utah Lake brown or milky?
What is the June sucker?
Why did people remove carp from Utah Lake?
Can kids help remove carp from Utah Lake?
How many kinds of birds live at Utah Lake?
Where can kids see birds at Utah Lake?
Are there field trips to Utah Lake for kids?
Can kids eat fish from Utah Lake?
Sources
The facts in this guide were checked against these sources. Hours, fees and rules change, so confirm anything time-sensitive with the source before you go. How we make Provo.com.
- Utah Lake Frequently Asked Questions (murkiness, carp, biodiversity), Utah Lake Authority. Checked October 20, 2026.
- June Sucker Recovery Implementation Program home and history, June Sucker Recovery Implementation Program. Checked October 20, 2026.
- Meet the June Sucker, June Sucker Recovery Implementation Program. Checked October 20, 2026.
- Managing Non-Native Fish, June Sucker Recovery Implementation Program. Checked October 20, 2026.
- Submit Your Sighting, June Sucker Recovery Implementation Program. Checked October 20, 2026.
- The Great Carp Hunt, Utah Lake Authority. Checked October 20, 2026.
- Carp Seining on Ice, Utah Lake Authority. Checked October 20, 2026.
- Utah Lake Field Trips, Utah Lake Authority. Checked October 20, 2026.
- Birds of Utah Lake lesson plan, Utah Lake Authority. Checked October 20, 2026.
- Utah Lake: No. 1 birding spot in Utah County, Utah Lake Authority. Checked October 20, 2026.
- Bet you've never heard of Bird Island, Utah Lake Authority. Checked October 20, 2026.
- Provo River Delta Restoration Project home, Provo River Delta Restoration Project. Checked October 20, 2026.
- Provo River Delta FAQs, Provo River Delta Restoration Project. Checked October 20, 2026.
- Fish Utah: Utah Lake (depth, pike rules, summer mosquitoes), Utah Division of Wildlife Resources. Checked October 20, 2026.
- Fish Consumption Advisories, Utah Department of Environmental Quality. Checked October 20, 2026.
- Mosquitoes mitigation: How the Utah County Mosquito Abatement District combats the blood-sucking insects, Daily Herald. Checked October 20, 2026.
