Colorful balloons will fill the sky over the St. Croix River Valley during the Hot Air Affair Feb. 1-3 in Hudson, Wis.

Balloonists are scheduled to compete in races at 7:30 a.m. on Saturday and Sunday.

On Friday, a torchlight parade, fireworks over the river and a benefit concert are part of the festivities. Other activities include geocaching, a walking art show, live music, dancing, a 5K race, kite demonstrations, a chili cook-off and more. More details at 1-888-247-2332 or