Gassan is a prominent mountain located in the Yamagata Prefecture of Japan. It stands at 1,984 meters (6,509 feet) and is part of the Chūbu region. Gassan is known for its beautiful natural scenery, especially during the summer and autumn months when the surrounding landscapes are vibrant with greenery and colorful foliage. The mountain is a popular destination for hikers and outdoor enthusiasts. It features various trails that cater to different skill levels, making it accessible for both beginners and experienced climbers. Gassan is also part of the Three Mountains of Dewa, which holds cultural and spiritual significance in Shinto beliefs.