The weather is cooling down, and it’s peak season for outdoor running. The Vineyard Haven Library 5K and 1/2 mile “fun run” (for kids 13 and under) will be hosted by the Friends of the Library on Sunday, Sept. 15. The course runs from the library on Main Street to the West Chop lighthouse, and back. There will be prizes for winners in all age groups, and a raffle. Registration begins at 8:30 am, “fun run” at 9:45 am, and 5K at 10 am. For more information, call 508-696-4211.