Lake Yankton Beach
Crofton, Nebraska · Lewis And Clark Recreation Area
Verified · 4 independent sources
- WATER
- reservoir
- ACCESS
- Designated swim area
- FEE
- No fee found
- SEASON
- Best in summer
About Lake Yankton Beach
Lake Yankton Beach is a designated swimming beach on Lake Yankton, a roughly 250-acre reservoir created immediately downstream of Gavins Point Dam near Crofton, Nebraska, and the area's established swimming hole. The beach lies within the Training Dike Day-Use Area, part of the U.S. Army Corps of Engineers' Cottonwood Recreation Area on the Lewis and Clark Lake/Missouri River recreation complex.
Lake Yankton sits in a re-regulating basin the Corps of Engineers formed while building Gavins Point Dam (1952-1957), which diverted the Missouri River's original channel; the lake now lies just below the dam and just upstream of the Missouri National Recreational River reach. Its shoreline is developed with the Cottonwood Recreation Area campground, boat ramps, fishing piers, and jetties, and it sits close to the Lewis and Clark Visitor Center and Nebraska Tailwaters day-use/campground area.
Swimming at Lake Yankton Beach
The beach offers calmer, more sheltered water than the much larger Lewis and Clark Lake upstream, since only electric boat motors have been allowed on Lake Yankton since the 1980s (gas motors are banned), which keeps the lake quieter for swimmers. Sources describe it as a popular local swimming beach in summer months, but none of the sources reviewed gave beach depth, bottom type, or lifeguard information.
How to get to this swimming hole
From U.S. Highway 81 in Yankton, South Dakota, drive four miles west on South Dakota Highway 52, then south on Dam Toe Road and follow signs to the Cottonwood/Training Dike day-use area on Lake Yankton's western shore (per recreation.gov directions for the adjoining Cottonwood NE campground).
The walk in
No real hike here. The water is a short walk from where you park. This is a drive-up day-use beach inside the Training Dike Day-Use Area/Cottonwood Recreation Area; recreation.gov and stateparks.com describe direct vehicle access via Dam Toe Road with an on-site boat ramp, picnic shelter, and fishing dock. No trail or hike to the beach is mentioned in any source found; walk from the lot to the water is presumably short (a few minutes), but no source states an exact distance.
Plan your visit
Bringing kids
OK with supervision
It's a designated, drive-up reservoir swim beach with calm water (electric-motors-only lake keeps boat wakes down), which favors families, but no source found confirms lifeguard presence, marked shallow zones, or beach bottom type, and the lake has documented aquatic invasive species (zebra mussels, past Asian carp). Treat as swim-at-your-own-risk / supervise kids closely.
Parking
Lot
The Training Dike Day-Use Area (where Lake Yankton Beach sits) has a boat ramp, picnic shelter, and accessible fishing dock, implying a maintained day-use parking area, but no source found gives a fee amount, fee-station details, or confirms whether day use is free vs. paid; USACE day-use areas at this complex are reached via Dam Toe Road off SD Hwy 52 from Yankton.
On the water
Restrictions: Only electric trolling motors are allowed on Lake Yankton (gas/gasoline outboard motors banned since the 1980s), per Wikipedia's Lake Yankton entry, which keeps the lake quieter than the adjoining Lewis and Clark Lake. Stateparks.com's Cottonwood Recreation Area page separately confirms 'kayaking, canoeing and paddling opportunities' and a boat ramp for lake access. All boaters must Clean, Drain, and Dry equipment per USACE aquatic-invasive-species rules (per recreation.gov).
A boat ramp exists at Training Dike Day-Use Area for launching kayaks/canoes/electric boats onto Lake Yankton itself.
Backstory
Lake Yankton was created as a re-regulating reservoir during construction of Gavins Point Dam (1952-1957). In 2011, Missouri River flooding allowed invasive Asian carp into the lake; a controlled fish kill in 2014 removed the carp and restored the fishery to what sources describe as exceptional condition.
Lake Yankton Beach: FAQ
Is Lake Yankton Beach kid friendly?
It's a designated, drive-up reservoir swim beach with calm water (electric-motors-only lake keeps boat wakes down), which favors families, but no source found confirms lifeguard presence, marked shallow zones, or beach bottom type, and the lake has documented aquatic invasive species (zebra mussels, past Asian carp). Treat as swim-at-your-own-risk / supervise kids closely.
Do I need to hike to reach Lake Yankton Beach?
No significant hike is required. The swimming area is close to parking and access.
Where do I park for Lake Yankton Beach?
The Training Dike Day-Use Area (where Lake Yankton Beach sits) has a boat ramp, picnic shelter, and accessible fishing dock, implying a maintained day-use parking area, but no source found gives a fee amount, fee-station details, or confirms whether day use is free vs. paid; USACE day-use areas at this complex are reached via Dam Toe Road off SD Hwy 52 from Yankton.
Can I bring a kayak or paddleboard to Lake Yankton Beach?
A boat ramp exists at Training Dike Day-Use Area for launching kayaks/canoes/electric boats onto Lake Yankton itself.
When is the best time to visit Lake Yankton Beach?
Summer, per official description of it as 'a popular swimming beach in summer months.'
What are the rules at Lake Yankton Beach?
Cottonwood Recreation Area rules (which cover the adjoining Training Dike Day-Use Area) include leashed pets (6 ft max), no fireworks, no outside firewood (invasive species concern), and off-road vehicle travel prohibited. Only electric boat motors are permitted on Lake Yankton itself (gas motors banned since the 1980s), and boaters must clean, drain, and dry equipment due to aquatic invasive species.
More swimming holes near Crofton
Lewis and Clark Recreation Area
Yankton, South Dakotareservoir
⛺🛶🏄🚤
Wall Lake Park
Hartford, South Dakotalake
Lake Alvin State Recreation Area
Harrisburg, South Dakotareservoir
🛶🏄🚤
Rivers Bend Campground
Rock Valley, Iowapond
⛺🛶🏄
Split Rock Lake Swim Beach
Pipestone, Minnesotalake
⛺🛶🏄🚤
Scharnberg Park
Everly, Iowapond
⛺🛶🏄