Bundled GPX routes for the world's most-ridden climbs and races. Pick one to load it into the calculator and predict your finish time at any power.
The most famous Tour de France climb. 21 numbered hairpins, an average gradient of 8.1%, and a finish at 1860 m altitude. The Bourg-d'Oisans approach is the version raced by the Tour and the one most cyclists know — steep early ramps over 10% give way to a more even middle, then a final pitch through the ski station.
The Bédoin route up the Giant of Provence: 21.4 km averaging 7.5%, with sustained sections above 10% in the forest from Saint-Estève. The final 6 km to the summit at 1910 m are exposed and notoriously windy — pacing matters as much as raw watts. The other two approaches (Malaucène, Sault) are gentler but Bédoin is the racing line.
The Bormio approach to the Stelvio Pass: roughly 21.5 km of climbing topping out at 2758 m, the second-highest paved pass in the Alps. Averages 7.1% with some sustained 9–10% pitches, fewer hairpins than the iconic Prato side but still a serious altitude effort. Often used in the Giro d'Italia as the Cima Coppi.
The Ironman World Championship bike course: 180 km out-and-back along the Queen K Highway from Kailua-Kona to Hawi and back. Mostly flat by Hawaiian standards but raced in heat, humidity, and the famous Mumuku crosswinds — air density and headwind have outsized effects on the bike split. Pacing for a sub-9 or sub-10 hour total day depends heavily on getting the bike right.