July is, I think, a little early for blackberries. Some of the native ones might be that early, but the invasive Himalayan Blackberry that dominates the lowlands is more of an August/September berry (these are the ones with major thorns). Salmon berry is earlier, as is salal.
In the mountains I'd expect to find more huckleberry - higher bushes in the lowlands, scrubby ones near the treeline.
From the WTA site:
https://www.wta.org/go-outside/seasonal-hikes/summer-destinations/berry-picking-hikeshttps://wholeu.uw.edu/2017/06/28/a-quick-and-juicy-guide-to-berries-of-the-northwest/https://www.fs.usda.gov/detail/mbs/passes-permits/forestproducts/?cid=fseprd500110
