It’s 5K season, and this weekend brings in another race for the books. On Sunday, Oct. 8, run the Columbus Day 5K in Oak Bluffs, starting at Summercamp Hotel. Join the certified 5K race around East Chop, which begins at 11 am, or the Mile Fun Run beginning at 10:30 am. Registration begins at the hotel on Saturday, Oct. 7, and on the morning of the race at 8:30 am. The first 200 registrants get a free T-shirt. For more information, visit oakbluffsschool.com.