Portage Lake Beach
Grass Lake, Michigan · Waterloo Recreation Area
Verified · 4 independent sources · top-verified
- WATER
- lake
- ACCESS
- Designated swim area
- FEE
- Yes, see below
- SEASON
- Varies by conditions
About Portage Lake Beach
Portage Lake Beach is the designated swimming area in the day-use section of Waterloo Recreation Area, Michigan's largest Lower Peninsula state park, near Grass Lake, Michigan. It is an official, developed swimming hole rather than a hidden or informal spot, with a beach house, concessions, and boat rentals that make Portage Lake an easy lake to swim in for day-use visitors.
The beach sits within the roughly 21,000-acre Waterloo Recreation Area, a glacially-shaped landscape of forest, wetlands, and inland lakes spanning Jackson and Washtenaw counties that was originally developed as a federal recreation demonstration project in the 1930s before being transferred to state management in 1943. Portage Lake's day-use area, reached by a paved path from parking, sits alongside the adjacent Portage Lake Modern Campground.
Swimming at Portage Lake Beach
Swimming happens at a sandy, developed lake beach in the day-use area, suited to casual family swimming rather than a wilderness experience. First-hand camper reports describe a small sandy shoreline with generally pleasant water, but note that conditions can turn murky and muddy later in the season, with seaweed that can tangle around swimmers' arms and legs.
How to get to this swimming hole
Parking: Day-use area parking serves the beach, connected to the swim area by a paved path (also noted as accessible via a handicap-accessible vista walkway from the campground).
The hike in
- Time on foot
- a few minutes' walk from the lot
Difficulty: easy - flat paved path
No hike is needed - this is a drive-up developed beach. A paved, wheelchair/stroller-accessible path leads a short distance (well under a quarter mile) from the day-use parking lot to the beach house and swim area; a separate handicap-accessible vista walkway connects the adjacent campground to the beach.
The wider Waterloo Recreation Area has ~47 miles of hiking trails (Waterloo-Pinckney Trail system), but none of that mileage is required to reach the swim beach itself.
Plan your visit
Bringing kids
OK with supervision
Sandy, developed lake beach suited to casual family swimming with a paved/accessible path from parking. No source confirmed lifeguard presence, and first-hand camper accounts note the water can turn murky/muddy later in summer with seaweed that tangles around swimmers' arms and legs, so supervise kids closely in late-season conditions.
Parking
Paid, Michigan Recreation Passport required for vehicle entry (as of 2026: $15/yr for residents at plate renewal, $29 for 2-year, $12 non-resident day pass) rather than a separate parking fee
Day-use area parking lot serves the beach house/swim beach, connected by a paved path; the campground also connects via a handicap-accessible vista walkway.
Restrooms
Yes
Beach house at the day-use area has restrooms and changing stalls; visitor accounts also describe a separate restroom right at the beach plus additional bathroom facilities in the adjacent campground loop, kept clean with showers nearby.
Water clarity
Varies with season and flow
No source describes the water as reliably clear. First-hand camper reports (TheDyrt) say the lake can be 'murky and dirty' with seaweed that 'gets tangled around your legs and arms,' especially later in summer; other visitor write-ups (RVParx) simply call the beach 'amazing' without addressing clarity, so conditions likely vary by season and recent weather.
Hours
Day-use/park hours are dawn to dusk; the on-site rental concession (JR's Concessions) operates seasonally, mid-May through early October.
On the water
JR's Concessions rents rowboats/boats at the beach house. A separate public boating access site for Big Portage Lake exists elsewhere in the recreation area for visitors bringing their own watercraft, but no source specified which craft types (kayak/canoe/motorboat) are permitted there or any horsepower/no-wake restrictions, so those are left unconfirmed rather than assumed.
Rentals nearby
JR's Concessions
Boat/rowboat rentals at the Portage Lake beach house concession stand
At the beach house in the Portage Lake day-use area, Waterloo Recreation Area · Seasonal, mid-May through early October (daily hours not published); phone 231-843-1888
What regulars say
Visitor reports are mixed on conditions: campers describe the sandy beach as generally pleasant for families but warn the lake can go murky and muddy with tangling seaweed later in the season. Some campers compare Portage Lake's campground unfavorably to Green Lake in the same complex and note traffic noise carrying in from M-52. Other visitors call the beach 'amazing' and the restrooms/showers 'top-notch' but note the beach and concessions close for the season (one found them closed on an off-season visit).
Backstory
Waterloo Recreation Area was developed 1935-1936 as a federal recreation demonstration project using CCC and WPA labor, and management was transferred from the National Park Service to the State of Michigan in 1943.
Portage Lake Beach: FAQ
Does Portage Lake Beach charge a fee?
A Michigan Recreation Passport (state park vehicle entry pass) is required.
Is Portage Lake Beach kid friendly?
Sandy, developed lake beach suited to casual family swimming with a paved/accessible path from parking. No source confirmed lifeguard presence, and first-hand camper accounts note the water can turn murky/muddy later in summer with seaweed that tangles around swimmers' arms and legs, so supervise kids closely in late-season conditions.
Do I need to hike to reach Portage Lake Beach?
No significant hike is required. The swimming area is close to parking and access.
Where do I park for Portage Lake Beach?
Day-use area parking lot serves the beach house/swim beach, connected by a paved path; the campground also connects via a handicap-accessible vista walkway.
Can I bring a kayak or paddleboard to Portage Lake Beach?
JR's Concessions rents rowboats/boats at the beach house. A separate public boating access site for Big Portage Lake exists elsewhere in the recreation area for visitors bringing their own watercraft, but no source specified which craft types (kayak/canoe/motorboat) are permitted there or any horsepower/no-wake restrictions, so those are left unconfirmed rather than assumed.
What are the rules at Portage Lake Beach?
Swimming is confined to designated swim areas: the Portage Lake day-use area (open to the public) and a separate camper-only swim area at Sugarloaf Campground.
