The Columbia Basin (24-9) blew out the Bellevue (24-6) 14-5 on Sunday after pouring on eight runs in the fourth inning.
The Columbia Basin scored in the fourth on a two-run single by Suzanna Lubanski, a three-run home run by Sarah Gilliam, an error, and a two-run double by Megan McMurrin.
Gilliam racked up seven RBIs on three hits for the Columbia Basin.
Tessani Dixon went a perfect 2-2 at the dish for the Bellevue. He singled in the first and fourth innings.
Kadi Patterson got his second win for the Columbia Basin despite allowing five runs over five innings. He struck out one, walked two and surrendered eight hits.
Ciera Lockwood was charged with his second loss of the year. He allowed six runs in 2 1/3 innings, walked none and struck out three.