This Indiana, Pennsylvania day trip follows a one-place, low-cost arc for families watching the budget. It suits people who’d rather spend the day in the water than pay for the privilege. It anchors at the Yellow Creek beach, 800 feet of sand on a 720-acre lake, where day use costs nothing and the only thing you have to bring is the cooler. But how you pack decides whether the day stays free.

The whole budget of this day sits in a grocery cart.

Giant Eagle at Town Fair Plaza, off Ben Franklin Road South, covers it: sandwich makings, fruit, a bag of ice, drinks, snacks for the drive, sunscreen. ALDI on Oakland Avenue is cheaper if you’re counting. Walmart on Oakland is where a four-dollar beach toy or a replacement pair of goggles comes from, which beats paying for one at the lake.

Pack towels, a change of clothes for everyone, and shade if you have it — an umbrella or a pop-up makes a long afternoon possible on a hot day. Fill the tank in town. The park is fifteen minutes east and the gas is cheaper here.

Yellow Creek State Park is on Route 259 in Penn Run, fifteen minutes east of Indiana on US-422, and day use is free.

Eight hundred feet of sand opens in late May and closes in mid-September, 8 AM to sunset daily. A changing house with an outdoor shower sits behind it, plus a snack bar in the beach area for when the cooler runs dry. Swimming is at your own risk, and the posted rules are worth reading on the way in — agree where the kids can swim to before anyone is in past their knees. No pets on the sand, and the beach area is smoke-free, with designated spots adjacent.

Get there before eleven on a hot Saturday if you want the closer parking and a table in the shade. The lake is big enough that the beach never feels like the only thing happening, but the shade near the sand is the part that runs out first.

If somebody in the family owns a kayak or a paddleboard, bring it: the lake is built for small craft, and non-powered craft need either a boat registration or a launch permit. No rental operates in the park, so this isn’t a day to turn up expecting to hire one.

Lunch out of the cooler is the transition. The morning was about getting in the water. The afternoon is about staying.

The park has picnic tables and pavilions spread through the day-use areas, and a sandwich eaten in a swimsuit at a shaded table is the entire point of a day like this. Then back in the water, or not. There are more than five miles of easy shoreline trails here if someone needs to move, and a shoreline walk at four in the afternoon costs the same as everything else today.

Alcohol is prohibited everywhere in Pennsylvania state parks, so leave it at the rental. Pack out what you brought in; the beach area bins fill up on a hot weekend.

Dinner is back at the rental, from the same grocery run, and the one thing you pay for on the way home is custard.

The Meadows Original Frozen Custard sits on Oakland Avenue in Indiana, where the flavor rotates daily and a line forms on summer evenings for a reason. It’s the cheapest possible ending to a free day: one cone each, eaten in the lot while everyone’s hair is still wet. Check the flavor calendar before you go, since the day’s flavor is the whole conversation in the car.

Then home, sandy, early, and done.

What this day costs: Park day use is free, and the beach is free. The grocery run covers breakfast, lunch and dinner. The only paid stops are fuel and the custard. Cross-link: Indiana Blog #36.

Season: The beach is open late May to mid-September. Outside that window the park is still open sunrise to sunset for the shoreline trails, but there’s no swimming and no snack bar. Cross-link: Indiana Blog #34.

Provisions — Giant Eagle: 475 Ben Franklin Rd S, Indiana, PA 15701. Sandwiches, fruit, drinks, ice, sunscreen. Cheaper: ALDI, 2910 Oakland Ave. Beach toys and goggles: Walmart Supercenter, 3100 Oakland Ave.

Fuel: Sheetz beside the plaza (525 S Ben Franklin Rd) and downtown (380 Philadelphia St), both open around the clock, with an ATM at the plaza.

Yellow Creek State Park: 170 Route 259 Hwy, Penn Run, PA 15765, about 15 minutes east of Indiana via US-422. Park office (724) 357-7913. Beach: 800 feet of sand, late May to mid-September, 8 AM to sunset, changing house with outdoor shower, snack bar in the beach area. Swim at your own risk; read the posted rules. No pets on the beach. The beach is smoke-free. No alcohol anywhere in the park. Cross-link: Indiana Blog #19.

Boats: No rental operates in the park. Bring your own non-motorized craft with a registration or launch permit; details from the park office.

Fishing: A Pennsylvania license is required at 16 and older: pa.gov/fishandboat. The lake holds largemouth bass, northern pike, perch, crappie and bluegill.

Bring: Cooler and ice, towels, dry clothes, sunscreen, shade if you have it, a trash bag, and cash or a card for the custard.

The Meadows Original Frozen Custard: 1994 Oakland Ave, Indiana, PA 15701. (724) 463-1117. Rotating daily flavors; check the current season and the flavor calendar at meadowsofindiana.com. Cross-link: Indiana Blog #18.

Emergency and connectivity: In an emergency, call 911. Indiana Regional Medical Center, 835 Hospital Road, Indiana, is the hospital in town. Cell service can fade at the park, so download directions first.

Rain plan: This is a weather day and there’s no paid booking to lose, which is the advantage of a free itinerary. Swap to a Blue Spruce walk (1128 Blue Spruce Road; cross-link: Indiana Blog #19) and keep the custard, or move the whole day to tomorrow.

Verify hours and availability for each stop — seasonal adjustments are common.

Host Note: [HOST INPUT HERE — e.g., whether beach chairs, umbrellas or a cooler live at the property, and which parking area is closest to the shade.]

A free day at the lake only works if the kitchen does the rest, which is the whole argument for staying somewhere with one. Summer weekends pull demand toward the lake corridor, and late August brings the county fair on top of IUP move-in. Guests booking in the surrounding communities get a kitchen for three meals, a yard for the wet towels and a fifteen-minute drive to the sand. Booking ahead is how a budget weekend stays a budget weekend.