Kirosan Observatory (Omishima)
Category 33.2 km
Distance
295 m
Elevation Gain
9.2%
Average Gradient
15%
Max Gradient
307 m
Summit Elevation
The Kirosan Observatory climb on Omishima Island is the Shimanami Kaido's hardest ascent and its finest viewpoint: 3.2km from the island's east coast at near sea level to the Kirosan Observatory platform at 307m, climbing 295m at 9.2% average with ramps to 15% on the final approach to the summit. Th...
Pro Tip
Kirosan is a detour off the official blue-line route — the Shimanami Kaido's main corridor bypasses the observatory road. The detour adds approximately 8km and 300m of climbing to the official 70km di...