The Legacy Trail is a rail-to-trail that connects Sarasota to Venice. It's a long, straight stretch of asphalt, commonly used for skating, biking, and running. It passes behind Oscar Scherer State Park, down to the historic train station in Venice.
Using the continuously connected Venetian Waterway Park, you can get all the way down to Shamrock Park in South Venice (or Caspersen Beach).
Map of The Legacy Trail
Friends of The Legacy Trail