Ride your bike around real-world circuits

Sixteen courses. Eleven follow the real mapped centerlines of famous race tracks. All free, in your browser.

Monsoon Cycles, Colorado Springs · Updated August 21, 2026

If you can draw these outlines from memory, this page is for you. Gumwall Grand Prix has sixteen courses, and eleven of them follow the real mapped centerlines of famous racing circuits: the same corners you know from television and racing sims, with the real elevation underneath. You ride them on a bicycle, in your browser, for free.

The shapes come from OpenStreetMap centerlines and the climbs from real elevation data, so the corner you brake for in a sim is the corner you will suffer up here. The circuits are not affiliated with us, and nothing here implies they are. I just wanted to ride around these circuits myself.

No download, no subscription. A smart trainer gives you the real gradients, a dumb trainer with a speed sensor works, and so do arrow keys. Click a shape and go.

OPEN THE GAMEWHY IT'S FREE
Spa-Frankenchamps The shape of the most beloved circuit in Belgium. 7 km, 169m of climbing. Snoredschleife The 20 km German forest monster, over 500m of climbing per lap. Moanaco The most famous street circuit in the world, harbor and all. 3.3 km. Le Yawns The endurance classic in France at dusk, public-road straights and all. 13.5 km. Monzoon The oldest grand prix venue in Italy, ridden in autumn. 5.9 km. Interlegos The famous circuit outside Sao Paulo, in the tropics. 4.3 km. Suzuku The only figure-eight in racing, under cherry blossoms. 5.8 km. Napkins Glen The classic American road course in the Finger Lakes. 6.3 km. Bathhurts Australia's famous mountain circuit, 185m of climbing per lap. 6.2 km. Lasagna Seca A famous California raceway, including its minus 8.5 percent signature drop. 3.6 km. Pikes Peak The real Pikes Peak hillclimb road, 2,860m to the 4,297m summit and back. 36 km. King Cobra TT Real ranch roads outside Wichita Falls, Texas, from a real recorded ride. 10 km. The Velodrome A true 333.3m outdoor concrete oval, patterned on the 7-Eleven Velodrome in Colorado Springs. Penny Circuit Our home circuit and the first map we ever built. 2 km. Original design. Hetchins Hairpins Snowline switchbacks to a 46m summit and straight back down. Original design. Gumwall Speedway Flat, fast, and lined with palms. 2.7 km. Original design.
Keep going: Full course details · How this compares to Zwift · Ride without a smart trainer
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