Hokkaido Prefecture, Japan

グリーンピア大沼, Greenpia Onuma

Ski area

• 4 km of mapped runs
• 2 mapped lifts
• Elevation 181–437 m (256 m vertical)
• Activities: downhill

Approximate resort centre, not a trail boundary. Confirm current conditions and access with the operator. An official trail-map link has not been verified for this listing.

Source: OpenSkiMap / OpenStreetMap contributors (ODbL), October 2026 — mapped figures; confirm with operator.