The Evo Triangle is so called after it’s regular use by EVO magazine as an ideal varied and demanding test route for their road tests, which they travel right across the country to reach. http://www.evo.co.uk/
It’s considered an excellent test of car and driver, and the route has become very popular among driving enthusiasts, and one of the most talked about routes in the UK. The route starts on the A543 (just off the A5) heading north and enjoys tight and sweeping bends and wonderful scenery. Turning right onto the B4501 takes you on to some nice long sweeping bends with views of the Llyn Brenig Lake. The road then leads back to the A5 (going through the village of Cerrigydrudion) and back to where you started.