| | | |
| June 1, 2018 | W | Cowlitz Black Bears 5 at Bend Elks 3 | Final |
| June 2, 2018 | L | Cowlitz Black Bears 4 at Bend Elks 6 | Final |
| June 3, 2018 | L | Cowlitz Black Bears 7 at Bend Elks 8 | Final (12) |
| June 4, 2018 | L | Portland Pickles 7 at Cowlitz Black Bears 2 | Final |
| June 5, 2018 | L | Portland Pickles 4 at Cowlitz Black Bears 3 | Final |
| June 6, 2018 | W | Portland Pickles 1 at Cowlitz Black Bears 3 | Final |
| June 8, 2018 | W | Kelowna Falcons 2 at Cowlitz Black Bears 6 | Final |
| June 9, 2018 | L | Kelowna Falcons 8 at Cowlitz Black Bears 6 | Final (12) |
| June 10, 2018 | W | Kelowna Falcons 8 at Cowlitz Black Bears 9 | Final |
| June 11, 2018 | W | Cowlitz Black Bears 4 at Port Angeles Lefties 3 | Final |
| June 12, 2018 | W | Cowlitz Black Bears 6 at Port Angeles Lefties 5 | Final (11) |
| June 13, 2018 | W | Cowlitz Black Bears 7 at Port Angeles Lefties 5 | Final |
| June 15, 2018 | L | Cowlitz Black Bears 3 at Corvallis Knights 6 | Final |
| June 16, 2018 | L | Cowlitz Black Bears 5 at Corvallis Knights 9 | Final |
| June 17, 2018 | L | Cowlitz Black Bears 1 at Corvallis Knights 6 | Final |
| June 19, 2018 | L | Bellingham Bells 6 at Cowlitz Black Bears 4 | Final |
| June 20, 2018 | L | Bellingham Bells 7 at Cowlitz Black Bears 4 | Final |
| June 21, 2018 | L | Bellingham Bells 5 at Cowlitz Black Bears 0 | Final |
| June 26, 2018 | L | Cowlitz Black Bears 3 at Yakima Valley Pippins 11 | Final |
| June 27, 2018 | W | Cowlitz Black Bears 2 at Yakima Valley Pippins 0 | Final |
| June 28, 2018 | L | Cowlitz Black Bears 3 at Yakima Valley Pippins 6 | Final |
| June 29, 2018 | W | Port Angeles Lefties 0 at Cowlitz Black Bears 8 | Final |
| June 30, 2018 | L | Port Angeles Lefties 15 at Cowlitz Black Bears 2 | Final |
| July 1, 2018 | L | Port Angeles Lefties 16 at Cowlitz Black Bears 3 | Final |
| July 3, 2018 | L | Cowlitz Black Bears 5 at Portland Pickles 13 | Final |
| July 4, 2018 | L | Cowlitz Black Bears 2 at Portland Pickles 10 | Final |
| July 5, 2018 | W | Cowlitz Black Bears 7 at Portland Pickles 1 | Final |
| July 6, 2018 | W | Bend Elks 0 at Cowlitz Black Bears 2 | Final |
| July 7, 2018 | W | Bend Elks 2 at Cowlitz Black Bears 3 | Final (10) |
| July 8, 2018 | W | Bend Elks 0 at Cowlitz Black Bears 1 | Final |
| July 9, 2018 | L | Cowlitz Black Bears 8 at Kelowna Falcons 14 | Final |
| July 10, 2018 | L | Cowlitz Black Bears 3 at Kelowna Falcons 4 | Final (10) |
| July 11, 2018 | L | Cowlitz Black Bears 5 at Kelowna Falcons 8 | Final |
| July 13, 2018 | L | Victoria HabourCats 4 at Cowlitz Black Bears 3 | Final |
| July 14, 2018 | L | Victoria HabourCats 3 at Cowlitz Black Bears 2 | Final (10) |
| July 15, 2018 | W | Victoria HabourCats 5 at Cowlitz Black Bears 6 | Final (13) |
| July 21, 2018 | L | Cowlitz Black Bears 0 at Walla Walla Sweets 9 | Final |
| July 22, 2018 | W | Cowlitz Black Bears 10 at Walla Walla Sweets 3 | Final |
| July 23, 2018 | L | Cowlitz Black Bears 3 at Walla Walla Sweets 11 | Final |
| July 24, 2018 | W | Cowlitz Black Bears 6 at Wenatchee AppleSox 3 | Final |
| July 25, 2018 | L | Cowlitz Black Bears 7 at Wenatchee AppleSox 8 | Final (11) |
| July 26, 2018 | L | Cowlitz Black Bears 5 at Wenatchee AppleSox 6 | Final |
| July 27, 2018 | L | Yakima Valley Pippins 7 at Cowlitz Black Bears 5 | Final |
| July 28, 2018 | W | Yakima Valley Pippins 2 at Cowlitz Black Bears 3 | Final |
| July 29, 2018 | L | Yakima Valley Pippins 7 at Cowlitz Black Bears 5 | Final (11) |
| July 31, 2018 | L | Cowlitz Black Bears 2 at Bellingham Bells 4 | Final |
| August 1, 2018 | L | Cowlitz Black Bears 2 at Bellingham Bells 3 | Final |
| August 2, 2018 | L | Cowlitz Black Bears 1 at Bellingham Bells 11 | Final |
| August 3, 2018 | L | Corvallis Knights 8 at Cowlitz Black Bears 1 | Final |
| August 4, 2018 | W | Corvallis Knights 3 at Cowlitz Black Bears 4 | Final |
| August 5, 2018 | L | Corvallis Knights 4 at Cowlitz Black Bears 1 | Final |
| August 6, 2018 | W | Walla Walla Sweets 0 at Cowlitz Black Bears 13 | Final |
| August 7, 2018 | L | Walla Walla Sweets 5 at Cowlitz Black Bears 3 | Final |
| August 8, 2018 | W | Walla Walla Sweets 0 at Cowlitz Black Bears 3 | Final |
Cowlitz Black Bears Schedule
