In case you don’t know, a duathlon starts with a running leg, followed by cycling, and finishing up with another running leg. But don’t let that intimidate you from joining the Prospect Park Fall Duathlon. There are several options for this event, including both 5K (being billed as the Gotham Cup Fuggetaboutit 5K) and 10K races. And proceeds go to the Prospect Park Alliance. Races begin and end at Lincoln Road entrance on Park Drive. If you prefer to walk, the foliage in Prospect Park is spectacular and a walk along the course is highly recommended.

Sun., Nov. 10, 7:30 a.m., 2013