
4 farms near Seattle pick blackberries, running August to September and peaking in August. The biggest cluster is around Arlington with 2 of them. 4 ask you to check before you drive out.
blackberries near Seattle
farms: Raising Cane Ranch picks blackberries in August, Bryant thornless blackberries late season
4 farms across 3 towns, biggest cluster first.
Each one read against its own website. Where a farm publishes nothing, this says so rather than guessing.

Arlington4.7
The season starts 26 June and runs early July through mid-September. Blueberries are the main crop with thornless blackberries seasonally.
Read from the farm's own site on 2026-08-21

Monroe4.4
A Monroe farm picking five berries plus kiwiberries and grapes, with a venue business alongside. It publishes no hours, season dates or prices.
Read from the farm's own site on 2026-08-21

Snohomish4.4
An August u-pick of figs, blackberries, William's Pride apples and aronias, with a cidery and an indoor and outdoor tasting room on the same ground.
Read from the farm's own site on 2026-08-21

Arlington4.4
The berry farm is closed for the season. In the farm's own words, "Come back to see us in October for pumpkin season!"
Read from the farm's own site on 2026-08-21