The splash pad is definitely one of the better ways to beat the heat. It is free and open 10 AM to 8 PM every day Memorial Day weekend through Labor Day Weekend and only on weekends through September. Arlington recently redid their water quality reporting system. You can check the the most recent readings by following this link: https://apps.hydroapps.com/arlingtonfm/public/dashboard.
There is a shaded pavilion with a few tables next to the splash pad. There is a grill near the pavilion.
The playground is also nice and is good for various age levels. The ground is mulch, so be aware for small children who like to put things in their mouths. There are some shades over the playground equipment, but not enough to cover all of the equipment so beware during the heat. It has swings, slides, and climbing obstacles. There are a few benches around the playground and throughout the park.
They have restrooms located next to the splash pad.
They have basketball courts and a football practice field. They also have a walking trail that goes around the park.
Brantley Hinshaw is a smaller park that has some nice amenities. The splash pad definitely makes it more worth it during the summer!
Fountains are turned off in late November/early December and turned back on in late March/early April to prevent serious freeze damage.