Dike Watermelon Days

Time: 8 a.m. to 4:15 p.m.

Location: Dike

Details: Water ball fight is Friday evening; parade is 2 p.m. Saturday; free watermelon at 4 p.m. Saturday in front of the fire station.

Downtown Waterloo Farmers Market

Time: 8 a.m. to noon

Location: Regions Bank parking lot

Kimball Ridge Family Market

Time: 8 a.m. to noon

Location: Ridgeway Place parking lot, corner of Kimball and Ridgeway avenues

Cedar Falls' Farmers Market

Time: 8:30 a.m. to noon

Location: West Third Street between Franklin and Clay streets, Cedar Falls

Waverly Farmers Market

Time: 8:30 to 11:30 a.m.

Location: 200 block of First Street Southeast, behind Keller's Furniture Store, Waverly

Run for the Flood 5K

Time: 9 a.m.

Location: Waverly City Hall, 200 First St. NE

Details: Americorps Iowa has assembled a disaster response team and sponsoring the run. The total profits will stay locally and be used for flood relief efforts.

Cost: $20; to register, e-mail mara.groom@wartburg.edu

Demolition Derby

Time: 10 a.m.

Location: Grandstand, Iowa State Fairgrounds, Des Moines

Tickets: $12 adults; with $5 for children ages 6-11. To order, go to www.iowastatefair.com

From Lanterns and Glowworms to the Night Sky and Caves

Time: 1 to 4 p.m.

location: Waterloo Center for the Arts, 225 Commercial St

Details: For ages 6 to 9, learn about the themes of dark and light by exploring interactive exhibits in the Phelps Youth Pavilion, playing games with light and shadows, creating shadow puppets, paper lanterns and glowworms for your room.

Fee: Pre-registration required by calling 291-4490; cost is $15

Free hog roast

Time: 4 to 8 p.m.

Location: 8100 Kimball Ave., Waterloo

Details: ASPIRE Therapeutic Riding Program is holding an open house and hog roast. Tour the ASPIRE farm and meet the horses.

Drill team competition

Time: 6 p.m.

Location: East High School gym

Details: Lords Warriors of Mount Carmel Missionary Baptist Church will be sponsoring the seventh annual drill team competition. The show will involved approximately 400 youths from all over the midwest.

Admission: $5; children 5 and under free.

Singles Nite Out with DJ Doug Shalla

Time: 7:30 to 11:30 p.m.

Location: Electric Park Ballroom, National Cattle Congress grounds, Waterloo

Details: Doors open at 7 p.m. For more details, go to www.djdougshalla.com

Admission: $8

Def Leppard in concert with special guest Everclear

Time: 8 p.m.

Location: Grandstand, Iowa State Fairgrounds, Des Moines

Tickets: $45; to order, go to www.iowastatefair.com

Comedian Rocky Whatule with David Taylor

Time: 9 p.m.

Location: Joker's, Fourth and Main streets, Cedar Falls

Tickets: $12 at the door; $10 in advance; call 266-1132 or go to www.barmuda.com.