Dogs will be competing alongside humans in a testing triathlon.

Four pups are among the first participants to sign up for the Inland Waterways Association’s first Waterways Triathlon which takes place on September 20 at Hoe Mill Lock, Ulting.

Participants will cycle, run and canoe either a 50km or 30km course, along the Chelmer and Blackwater Navigation.

Groups can divide the course to complete as a relay.

Entry costs £35 and sponsorship raised will go towards Essex Waterways or The Susan Trust, a historic Chelmer lighter boat restoration project.

For more information visit waterways.org.uk/triathlon or call 01494 783 453.