Set yourself a challenge and hike up Mount Haguro. Beautiful views and a great sense of achievement will be the payoff!
You'll be spoiled for sightseeing choice when spending time in Tsuruoka. Mount Haguro is a good place to start here, but there are plenty of other fine attractions to enjoy. Dewasanzan Shrine, Shonai Movie Village, and Gassan are close to the steep landmass and will top off your day nicely.