McCook Lake Is Full Again, But Dakota Dunes Residents Are Already Watching For What Happens This Fall

Walk the Dakota Dunes Trail toward The Point Nature Preserve this month and you will eventually run out of pavement near the spot where the Big Sioux River meets the Missouri, the place locals point to as the only spot where Iowa, Nebraska, and South Dakota all touch at once. Keep walking north instead, toward McCook Lake, and you will find a lake back at full pool this summer, boats running at normal speed, no restriction on the water for the first time in nearly two years.

That normalcy is newer than it looks, and the numbers behind it explain why a lot of neighbors are treating this summer as a pause rather than a finish line.

Two Inches A Day, Back In April

On April 1, the South Dakota Game, Fish and Parks department lifted the no-wake restriction that had governed McCook Lake since it reopened to boating in September 2024, a little more than three months after the June 2024 flood tore through the Big Sioux River basin and sent water crashing into the lake community that sits just north of Dakota Dunes. The old 1976 flood plan had diverted river water toward McCook Lake specifically to protect North Sioux City and Dakota Dunes, and it worked in the sense that neither community took the direct hit. McCook Lake did.

With the restriction lifted, the McCook Lake Association started pumping water back in, aiming for the Memorial Day weekend. Dirk Lohry, the association's president, put the math plainly to a Sioux City television station at the time: the lake holds about a billion gallons when full, it had roughly 250 million gallons in early April, and it was rising about two inches a day. At that rate, he said, it would take about 40 days to reach target level, putting full pool right around mid-May, just ahead of that Memorial Day target.

Two inches a day is not a fast number, and it is worth remembering now that the lake looks ordinary again. What reads today as a normal summer on the water is the tail end of a refill that took most of spring to finish.

The Acres Never Matched The Tons

While the lake was still rising, a resident named Renae Hansen gathered 468 signatures in a single week on a petition asking the state to restore the no-wake restriction until more debris was cleared. Her petition cited an Army Corps of Engineers survey showing that only 11 of the lake's 223 acres had been cleared of debris at that point.

A joint statement from North Sioux City, Union County, the McCook Lake Association, and the McCook Lake Izaak Walton League countered with a different number: more than 64 tons of debris and about 20,000 cubic yards of sediment already removed, work done by Three Oaks Construction under a $1 million state contract awarded through a competitive bidding process.

Both numbers were accurate at the same time because they measured different things. Eleven acres is a footprint, how much of the lake bottom had been physically surveyed and cleared square foot by square foot. Sixty-four tons and 20,000 cubic yards is a volume, how much material had actually come out, and a lot of volume can come out of a small footprint if the debris was concentrated rather than spread evenly across the lake bed. Lohry argued as much himself at the time, saying the surveyed areas were the ones most likely to hold hazards and that sonar and boat surveys had marked what remained with buoys.

Hansen's concern was less about the arithmetic and more about who reads a headline without the context behind it. Her worry was that Memorial Day and July Fourth visitors would hear the no-wake restriction was gone and assume the lake was simply back to normal, when what actually happened is a state agency decided the risk profile had changed enough to allow faster boat traffic, not that every hazard was gone. Officials said at the time they planned additional signage on the water to make that distinction clearer, and the joint statement acknowledged cleanup and testing would continue, with water levels expected to drop again this fall, which will expose more of the lake bed for another round of work.

That fall drawdown is the detail worth carrying into September. The lake you see full and busy right now is not a finished recovery. It is a recovery on pause until the water comes down again for another look underneath.

The Trail Doesn't Care Either Way

While the lake worked through its spring refill, the rest of the outdoor routine in Dakota Dunes kept running on its own schedule, and it still is. The Dakota Dunes Trail runs about 2.8 miles from Dakota Dunes Boulevard to The Point Nature Preserve, cutting through open fields along Interstate 29 before dropping into a wooded stretch near the Big Sioux Bend, the same three-state confluence mentioned earlier. The eastern, riverfront segment is the more scenic half, but it also sits close enough to the water that it can flood on its own schedule, so anyone planning a longer walk out that way is better off checking current trail conditions before committing to the full route.

Closer to the center of the neighborhood, the short loop around Prairie Boulevard Park is the more dependable option most days, a half mile of gravel path circling an open grassy field with basketball courts, the kind of low-commitment loop that fills up with walkers, joggers, and kids on bikes on any ordinary evening. It is not dramatic, but it is the trail that is actually there every single day, lake or no lake.

A Short Season At Two Rivers

Golf has stayed on schedule too. Two Rivers Golf Club, the public course tucked into Dakota Dunes at 150 Oak Tree Lane, has been open since 1909, laid out by architect Leonard Macomber on a par-70 course that plays short by modern standards but leans on small greens and mature trees to make up the difference. Daily green fees run in the neighborhood of 21 to 26 dollars for nine or eighteen holes depending on the day, which keeps it one of the more accessible rounds in the area for a course with that much history behind it. For anyone looking for something a step more formal, Dakota Dunes Country Club sits on the other side of the neighborhood with its Missouri River views and banquet space built for weddings and corporate events.

Between the golf course, the trail loop, and a lake that spent all of spring climbing back to full pool, the actual texture of a Dakota Dunes summer this year is less about a single reopening date in April and more about a recovery still being measured in phases, one of which is already behind us and one of which is still ahead this fall.

That is really the thing worth understanding about this particular season here. The headline said the lake reopened in April. The full story is a shoreline that took until mid-May to actually catch up to that headline, and a fall drawdown still to come that will reopen the debris question all over again. People who live close enough to McCook Lake to notice the difference are already planning around it. That gap between headline and timeline is probably more useful to know than the headline ever was.

If you are watching this recovery from a little further away, whether you are already a neighbor here or just keeping an eye on Dakota Dunes for other reasons, the Vakulskas Group tracks these details because we live and work in this part of Siouxland every day. Reach out anytime you want a straight read on what is actually happening in this neighborhood, lake included.