Large, 400-hectare marshland popular for its hiking trails through many scenic spots.
This high moor in the Oku-Nikko region extends into Nikko National Park. Part of it is protected under the Ramsar Convention, an international treaty for the conservation of wetlands. The name ”Senjoga-hara” derives from a legend that it was once the battlefield of wars between two mountain gods, Mount Akagi and Mount Nikko, over Lake Chuzenji. Boardwalk trails circumnavigate the moorland. One popular hiking trail goes from Yumoto Hot Springs to Ryuto Falls (about two-and-a-half hours). There are scenic lookouts to view the moor with Mount Nantai as a backdrop. Grand natural vistas, full of variety, include fresh green leaves in spring, fully bloomed hare's tail cotton grass (Eriophorum vaginatum) and Spiraea salicifolia in July, and bright-red fields of grass during late September to early October. To reach the observation deck at Senjoga-hara, take the Tobu bus bound for Yumoto-onsen from JR Nikko Station (about 50 minutes), get off at Sanbonmatsu bus stop, and walk about one minute.