- Phoenix Trail traffic-free cycle routePhoenix Trail Cycle Route Overall Rating: ⭐⭐⭐ The Phoenix Trail is an 8 mile, almost entirely traffic-free cycling route in Oxfordshire, linking Princess Risborough with Thame. With the steepest gradient along the route being less than 2%, we can safely call it very flat (as is often the case with trails built on disused railway … Read more