Lollapalooza takes over Grant Park, which is in the heart of downtown Chicago near Lake Michigan. Assuming you're not staying in a hotel across the street, here's how to make your way there:
Ride with the CTA or Metra
Getting to the park at the same minute as tens of thousands of others turns into a shitshow at peak hours. A cab or ride share will get you there, but most people opt for public transit. Any CTA line will get you downtown, but the Red and Blue Line Jackson stop is closest to the main entrance. If you’re riding the Metra, the Van Buren stop on the Electric Line is located within the park.
Shuttle or share
Uber or Lyft is typically a bit cheaper than cabs in Chicago (although peak Lolla times are inevitably prone to surge charges), but you can get $15 off your first ride Uber using the code RIDE2LOLLA. There is also a range of shuttle options -- try this helpful site where you can enter your address to find the closest one. If you insist on driving, you can park at garages near Grant Park (though you’d be wise to reserve a spot in advance).
The most fun way to get to Lolla is by bike (provided where you're staying is within biking distance). There is bike parking outside the main entrance, and local bike rental joints are offering discounts for out-of-towners, although you could just as easily participate in Chicago’s public bike sharing program, Divvy (check their site for locations).