Lakes Jam features record-breaking attendance, packs in 4 successful days at BIR for outdoor music fest Lakes Jam 2021 packs in four successful days, bringing close to 35,000 people to Brainerd International Raceway. 8:40 pm, Jun. 27, 2021 × Carly Pearce performs Saturday, June 26, 2021, during Lakes Jam at Brainerd International Raceway. Kelly Humphrey / Brainerd Dispatch Face masks and social distancing were out of sight as smiles, laughter and social closeness were part of Lakes Jam at Brainerd International Raceway, north of Brainerd. The number of people — record-breaking attendance, in fact — throughout the four-day outdoor music fest, Wednesday through Saturday, June 23-26 — made it evident people were ready to go out and gather after staying home during the pandemic that hit the United States in March 2020, resulting in the cancellation of music festivals, concerts and large public events for more than a year.