It’s a hot ACL weekend.Sunday’s  high of 92 will feel like 100 degrees if there aren’t any clouds, so if you get a wild hair to take a dip in  Barton Springs Pool, here’s what you know about how to get there during the festival.

The walk from Barton Springs Road to the Robert E. Lee Road entrance to Barton Springs is a nice stroll along the creek and the hike-and-bike trail. Addie Broyles / American-Statesma

First, for locals or anyone not going to ACL: If you are just coming to swim, the parking lot on the south side of the pool is open for swimmers only. You could bike or walk on the trail to get there, too.

If you are going to the festival and want to pop out for a memorable dip in a  historic pool, you’ll have to walk about half a mile from the Barton Springs Road entrance, but it’s along a beautiful part of Austin’s beloved greenbelt system, so you can catch kayakers and paddleboarders floating in Barton Creek. Walk along Robert E. Lee Road (yes,  it’s controversial) and then turn right when you get to the Barton Springs Pool parking lot. If you walk along the trail, you’ll walk right to the entrance.

It takes about 10 minutes to walk from the East Barton Springs Road entrance to the entrance of one of America’s coolest pools.

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You can use a card at a kiosk outside to pay the  entrance fee ($3 for Austin residents, $8 if you are from out of town) or you can use cash at the booth. Stamp your hand if you want to get back in later in the day. Admission is free after 9 p.m., which means there’s often a large crowd on warm summer (and fall) nights.

The only entrance to Barton Springs Pool that is open right now is the one facing Robert E. Lee Road on the south side of the pool. Addie Broyles / American-Statesman

Note that Barton Springs is one of the few clothing-optional swimming locations in Austin and that swimming in Barton Creek or Lady Bird Lake is  technically illegal. (You’ll see lots of people – and their dogs – swimming for free in the spillway at Barton Springs Pool.)

Here’s the best part: The pool is open from 5 a.m. until 10 p.m., so you can go before or after the music.

The mornings are warm and moon is still bright enough to make for an amazing nighttime swim, if you needed another excuse to check out one of Austin’s most iconic spots.

Barton Springs Pool is open from 5 a.m. to 10 p.m. nearly every day of the year. It is closed during the day on Thursdays. Addie Broyles / American-Statesman

Barton Springs Pool is one of the largest pools in the country. It is spring-fed and home to an endangered species of salamander. Addie Broyles / American-Statesman