The Outer Circle is used by road cyclists. One circuit is 4.45 km. A number of amateur cycling clubs meet regularly to complete laps of the Outer Circle for exercise and leisure. Prominent clubs include Regent’s Park Rouleurs (RPR), Islington Cycling Club (ICC), Cycle Club London (CCL), Rapha Cycle Club (RCC). In 2015, Regent’s Park Cyclists was formed to represent the interest of cyclists and cycling clubs that use the Inner & Outer Circle.

Cycling is also permitted on designated main routes through the Park.