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Gassan Highland Autumn Foliage and Alpine Plants: Tohoku's Earliest Mountain Autumn

Photo: Se. Tsuchiya on Unsplash

Seasonal Picks๐Ÿ‚ Autumn

Gassan Highland Autumn Foliage and Alpine Plants: Tohoku's Earliest Mountain Autumn

๐Ÿ’ Yamagata|Published May 11, 2026|Updated July 30, 2026
โœ๏ธ Edited by the Tabitabi JAPAN Editorial Team(based on official and primary sources)

Gassan Autumn

Mt. Gassan's (1,984m) alpine zone in Yamagata is one of Tohoku's earliest places for autumn foliage. From early September, the high alpine zones above 1,500m see grass and bamboo grass coloring begin, with brilliant foliage covering the mountain trails by mid-to-late September.

Highlights

  • Grass Autumn Color (Kusa Momiji): Alpine plants turning red, yellow, and orange
  • Alpine Pond Reflections: Foliage reflected in the pools scattered across summit highland marshes
  • Bamboo Grass Coloring: Carpet of yellow-tinged bamboo grass
  • Eighth Station to Summit: Hiking course through autumn foliage

Foliage Period

  • Early September: Color change begins near the summit
  • Mid-to-late September: Most beautiful along the hiking trails
  • Early October: Mid-mountain slopes color up

Getting There

  • Shizu Course: Access from Nishikawa-machi via Gassan Ski Resort
  • Yumisarihira Course: From Nishikawa-machi Yumisarihira
  • Haguro-san Course: From Tsuruoka side via Haguro-san (requires more time)

Tips

Mt. Gassan weather changes rapidly. Bring thorough cold and rain protection. Trailhead parking lots fill early on foliage season weekends.

๐Ÿ“ Location & Access

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โœ๏ธ About this article

This article is compiled by the Tabitabi JAPAN editorial team from official and primary sources, including facility and shrine/temple websites, tourism information published by municipalities and tourism associations, and cultural-property records released by national and local governments. Prices, opening hours and event dates may change, so please also check the official information of each facility or local government before you visit.

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