Mt. Mitsuishi in the Fall!
Ambitious hikers could continue past the summit to make the 15km loop known as the “Ura Iwate Traverse” and enjoy stunning views from Komokkodake, Obukadake, and Gentagatake. This longer hike would likely take 6 to 8 hours depending on your pace, so allow for time to get back before dark.
If you’re just going from Matsukawa Hot Springs to the summit and back, that is likely going to take about 2 hours to get there, and a bit less for the return trip.