This nature walk from Hakone Botanical Garden to Togendai is lovely and easy. It takes about 2.5 hours and is best taken on a dry day. Highlights include Sengokuhara pampas grass, views of Ōwakudani sulphur plumes and the surrounding mountains, cedar and bamboo groves, some fish and bird sightings and ending at Lake Ashi. I recommend book-ending your walk with some time in quaint Sengokuhara and at Lake Ashi.
To reach the trailhead: From Sengokuhara (仙石原) head towards and past the Hakone Botanical Garden, take a right at the Japanese restaurant Fukufu, and follow the signs to Kojiri (湖尻). Note that the route is briefly residential, but carry on and you’ll find the trail head.
Find out more about Lake Ashi.