The DC101 Chili Cook-Off was an annual rock concert sponsored by Washington, D.C. / Baltimore, Maryland radio station WWDC (FM).

The main features of the event were a rock music concert, although vendors and sponsors also set up booths to form a temporary marketplace.

The concert portion showcased the music of several modern rock acts, all performing on a single stage erected in the RFK stadium parking lot.

In later years, a "Last Band Standing" competition was held to select a local group to open the show.

Some bands have performed at the festival during more than one year, including Downtown, Bird Dog Wheeler, Child's Play, emmet swimming, Seven Mary Three, Sponge, Jimmie's Chicken Shack, Finger Eleven, Puddle of Mudd, Carbon Leaf, Third Eye Blind, Rude Buddha, Switchfoot, Chevelle, Papa Roach, Cake, and Seether.