It's the most wonderful time of the year: Summer! The weather’s getting warmer, the produce is perfect, the kids are out of school and there’s no shortage of things to do with your longer days. The sky is the limit, and even a lack of sun in the sky can't dampen your summer spirit. On any given evening when the sun begins to set, outdoor music venues across the country host concert series featuring local and world-famous artists—for free. We've got a few in our hometown of Santa Barbara (jazz on Wednesdays, bluegrass on Sundays) and we're willing to bet your town has a free summer concert series, too. So pack a picnic and head to the local park, pavilion or amphitheater for a no-cost, people-watching, frisbee-throwing, outdoor-dancing, beer-sampling good time. And since not all free concerts are created equal, here's a few of our favorites in some great cities across the country. Use these incredible outdoor concert series as an excuse to plan the summer road trip you've been daydreaming about…

Nightfall Concert Series in Chattanooga

With nearly three decades under their belts, the organizers of Chattanooga’s free Nightfall Series know how to put together a summer concert lineup. Every Friday from May - August, head to Miller Plaza to watch a local band open for a national headliner—many of whom will play in Chattanooga for the first time in 2016. This summer’s diverse lineup runs the gamut from bluegrass to Afro-pop, and no matter who’s playing, admission is always free. In addition to the varied musical selection, come to Nightfall prepared to please your palate with grub from local food trucks and local booze vendors. The 2016 Nightfall Concert Series has a special twist, too: on the first Friday of each month, crowds will gather at the Bessie Smith Cultural Center, then “Rock the Block” down to Miller Plaza—enjoying a parade of antique motorcycles, cars, and bikes, collected by local hobbyists, along the way. Get your Chattanooga choo-choo on!

Millennium Park in Chicago

Visit Chicago’s 24.5-acre Millennium Park today, and you’d never guess it was an industrial wasteland for nearly a century and a half. With some help from world-renowned architect Frank Gehry—whose other notable designs include the Guggenheim Museum in Bilbao, Spain and the Walt Disney Concert Hall in downtown Los Angeles—the seminal park took shape in 1997, and is now home to one of the country’s best-known summer concert series. The 2016 Millennium Park Series lineup is as genre-defying as the park’s architecture, and includes free twice-weekly concerts (Mondays and Thursdays) from June through August.

City Park Jazz in Denver

Whether you get there by bike (there’s a free corral), public transit, on foot, or by car, arrive early for the City Park Jazz series and enjoy some time exploring the Park before the show. There's the Denver Zoo, or the Denver Museum of Nature & Science, which features rotating natural history exhibits, a planetarium, and a terrace featuring some of the city’s best views of the Colorado Front Range. Adventurous park visitors can rent cruiser bikes, surreys, pedal boats, and kayaks to explore the park.When the sun goes down each Sunday between June and August, head to the pavilion—rain or shine—for a diverse cultural mix of music and local cuisine.

Concerts at the Mural in Seattle

Pickwick - Hacienda Motel (Live at the Mural) from KEXP RADIO on Vimeo. During KEXP & Seattle Center's Concerts at the Mural series at the Mural Amphitheater. Recorded 8/26/11. Video courtesy of KEXP. The music scene that brought you Jimi Hendrix, Nirvana, Pearl Jam, Modest Mouse, Death Cab for Cutie, and countless others brings you free concerts every Friday in August at the Seattle Center.The beautiful Mural Amphitheater was built for the 1962 World’s Fair, which also featured artwork by contemporary American painters like Georgia O’Keefe and Jackson Pollock, as well a performance by Roy Rogers and Dale Evans and a concert by Ella Fitzgerald. Today, you can enjoy free Live at the Mural shows with the backdrop of that quintessential Seattle symbol, the Space Needle. In a city with a music history as rich and colorful as Seattle’s, you know the free concert scene will knock (or rock) your socks off.

Twilight Concerts in Santa Monica

Few outdoor venues have the staying power of the century-old Santa Monica Pier. You know the one: located just north of Muscle Beach, the iconic pier has appeared in dozens of movies and television shows, and was once considered the best fishing spot in Santa Monica Bay. Several makeovers later, the modern-day pier is home to an amusement park, complete with a giant solar-powered ferris wheel, the original 1920s carousel, and an aquarium. This year’s Twilight Concerts lineup runs Thursdays from July through September and features a diverse lineup of bands from across the country. Tip: skip pricey parking near the pier and opt for public transit—or bike valet—instead. Whatever free concert series you visit this summer, make sure you spend it with good company. Let us know which concerts we missed! Originally written by RootsRated for Toad&Co. Featured image provided by Nightfall Music Series.