Good to know
- KDF says the Thunder air show usually starts at 3 p.m. and the fireworks run from 9:30 to 10 p.m.
- The first Thunder Over Louisville was held in 1991 over the Ohio River, according to KDF.
- Drones are banned within 5 miles of the Thunder venue under an FAA no-fly zone.
Thunder Over Louisville is the one Derby Festival event almost everyone in the region knows. It is an all-day gathering on both banks of the Ohio River that ends in one of the biggest fireworks shows in the country. The festival’s FAQ calls it the nation’s largest annual fireworks event and one of the top five air shows in the country.
How it got its name
Fireworks have been part of the Derby Festival since the 1960s, according to KDF. The festival held its first opening ceremonies event in 1990, and after that show the producers noticed how the sound rolled across the landscape like thunder. The first Thunder was held downtown over the Ohio River in 1991. The air show was added gradually to stagger crowds arriving and entertain them before the fireworks, and KDF says it is now an event of its own.
When it happens
KDF describes Thunder as the festival’s opening ceremonies, held two weeks before the Kentucky Derby on the first Saturday in May. Check the festival’s site each winter for the exact date.
| Time (per KDF FAQ) | What happens |
|---|---|
| 9 a.m. | North Great Lawn at Waterfront Park opens |
| 11 a.m. | Waterfront Park activities begin; free bike valet opens |
| 3 p.m. | Air show starts along the river; food service begins at all sites |
| 9:30 p.m. | Fireworks begin |
| 10 p.m. | Fireworks end |
| 11 p.m. | Bike valet closes |
Where to watch
KDF says the show is so large it can be seen almost anywhere along the river. Public viewing areas run from 8th Street to Clay Street north of Main Street on the Kentucky side, and along Riverside Drive from Ashland Park in Clarksville to Spring Street in Jeffersonville, Indiana. All of Waterfront Park is open for free public viewing. The Chow Wagon and the North Great Lawn at Waterfront Park offer front-row views, with admission free with that year’s Pegasus Pin. In Jeffersonville, KDF notes the area between the Clark and Kennedy bridges is very limited and that more viewing space has been developed east of the Kennedy Bridge between Fort and Pearl streets.
What to bring, and what not to
KDF’s rules for the event area, which runs from the river south to Main Street between Clay and 10th streets:
- Allowed: picnic blankets, tarps up to 10 feet by 10 feet, lawn chairs, plastic bottles and food.
- Not allowed: tents or canopies of any kind; tape, rope or pennant lines; glass bottles; alcoholic beverages brought in; bikes, skateboards or skates inside the venue.
- Drones: KDF says the FAA sets a no-fly zone around the venue and drones are banned within 5 miles; violators face confiscation and fines of up to $11,000.
- All persons and bags are subject to search.
Beer is sold at the Chow Wagon, the North Great Lawn and two beer gardens, according to KDF.
Parking and getting there
The Louisville Metro Police Department advises parking as far away as you can comfortably walk, in a direction that points you toward home. KDF notes more than 52,000 public off-street parking spaces within a 10-block walk of the river downtown. TARC buses run normal routes with expanded service all day. If you cycle, KDF offers free valet bicycle parking at the northeast corner of Witherspoon and Preston streets, north of the ballpark.
Tip: Tell children before you go that if they get separated, they should find a police officer and ask to be taken to a Lost Child Center. KDF recommends exactly that.
Weather
KDF says highs on Thunder day have ranged from the mid-40s to the mid-80s, and that it generally gets cooler at night. Bring a sweatshirt or jacket even on a warm afternoon. NOAA’s normals for April at Louisville’s airport show an average high of 69.6°F and low of 48.5°F; more in Louisville Festival Weather by Month: What to Pack and When to Worry.
Watching from a boat
KDF publishes boating safety tips. A no-wake zone covers Ohio River miles 602.3 to 598.0, there is a picket line at the Big Four Bridge, and the Coast Guard sets a no-entry zone from mile 606.0 to 602.0 starting at noon. KDF warns of strong spring currents, debris, crowded water with an estimated 450 boaters, and river water that can be around 40 degrees, cold enough to cause hypothermia within minutes. Its conclusion: the safest place for a boater to enjoy Thunder is from the bank.
Accessibility
KDF says the entire event area is accessible, with no designated viewing areas. Accessible parking is available first come, first served in the area garages, near the Kennedy Bridge in Jeffersonville and near the Falls of the Ohio Interpretive Center in Clarksville.
What it costs
Thunder is free with the purchase of that year’s Pegasus Pin, which KDF listed at $7 in advance and $10 at the gate for 2026. The pin also opens other festival events; see Derby Festival on a Budget: Free Events and What the Pegasus Pin Covers and The Kentucky Derby Festival: Louisville’s Spring Season Explained.