Colorful sunsets and groovy groves leap to mind when describing the S.B. Museum of Natural History’s upcoming 21st Annual Artwalk, this year themed California Landscapes: From Realism to Abstraction. While strolling along the Artwalk-which will boast a considerable selection of eye-catching works like Tom DeWait’s “September Moon” (pictured)-patrons will also enjoy live music, food, and entertainment. It takes place Saturday-Sunday, September 26-27, from 10 a.m.-5 p.m. at the S.B. Museum of Natural History (2559 Puesta del Sol Rd.). $9-$10. Call 962-6316.