The winner and three guests will enjoy an exciting guided trip aboard a rigid inflatable boat in Pembrokeshire. The boat will travel the Teifi river up to Cardigan and head out of the estuary to Cardigan Island. Beyond this, the tour will take in the breath taking North Pembrokeshire coast, exploring its sea caves.
If the winners' luck continues they could also encounter some of Cardigan Bay's resident bottlenose dolphins, grey seals and birdlife. Finally, the tour party will enjoy a pub lunch at the Ferry Inn.
For your chance to win visit www.postcodelottery.co.uk/canalrivertrustcomp and complete a simple form on the page. The closing date is 12 September.