The third annual Nutmegman eco-friendly charity triathlon, relay and aqua-bike race will be held Sept. 20 at Kettletown State Park in Southbury.

The race will feature a 1.2 mile swim in Lake Zoar, a 56-mile bike ride around Southbury, Oxford and Seymour and a 13.1 mile run on shaded roads in and around the park.

Available to those who won't compete all legs are the aqua-bike option (swim and bike only) or two or three-person relays.

The event is sanctioned by USA Triathlon.

Registration is available at active.com. For information, visit www.endureitmultisports.com.