43rd annual Seaport Striders 5K and 10K run. Chip-timed race. Kids' Mile at 9:30 a.m. Check-in and same-day registration starts at 8:30 a.m. at Granite Lake Park. 5K runners do an out-and-back on the Greenbelt Trail System. 10K runners cross over the Interstate Bridge to Lewiston, then run south along the Snake River to cross the Southway Bridge back to Clarkston, then north along the river trail to the finish line at the park.