December 5
Subject to snowfall — some runs may open earlier
May 15
May extend into spring on higher terrain
Ontake 2240 typically opens around December 5 each year. The opening date can vary by a few weeks based on early-season snowfall — some high-altitude runs open earlier.
The season at Ontake 2240 usually runs until May 15. Higher glacier areas (if available) may stay open through spring and early summer.
Peak season runs from Christmas through the February school holidays, when slopes are busiest and prices highest. January mid-week and late March are the best value windows — excellent snow with fewer crowds.