Escape the north London traffic to enjoy these brilliant fast-rolling country lanes. They're well-maintained and wide, with good visibility meaning you can make the most of the descents.
Just as the legs start to tire at the halfway point, you'll find the Ferny Hill Farm, complete with tea rooms. Get a cream tea or something from the Breakfast Menu (served til 3pm).
From there, complete the loop by coming back through Muswell Hill and Highgate. Negotiate Camden and you're back in the park.