Mount Aso Outer Rim Road
Category 215 km
Distance
700 m
Elevation Gain
4.7%
Average Gradient
11%
Max Gradient
1100 m
Summit Elevation
The Mount Aso Outer Rim Road in Kumamoto Prefecture is Japan's most dramatic volcanic cycling climb — a Category 2 ascent of 15km gaining 700m at 4.7% average on a road that circles the outer caldera wall of the world's largest active volcanic caldera system, delivering views of a scale and strangen...
Pro Tip
Mount Aso volcanic activity periodically restricts access to roads in the caldera zone — check the current alert level on the Japan Meteorological Agency volcano information page before travelling. Th...