Permit for loch calder available from Harpers shop in Thurso, the Tall Tales bookshop take bookings for the river Thurso, and Hugo Ross in Wick can advise you on fishings on the Wick side. The Brown Trout in Watten have permits for the loch behind the hotel, and Halladale Inn at Melvich also arrange fishing days. Hope this steers you in the right direction.
Bookmarks