Sullivan Gulch Trail is a short hike up a steep gulch from Big Thompson Canyon. At the top of the gulch, there are two short trail options to viewpoints to the right and left making a "T." You get great views from here and along the arms of the "T" down Big Thompson Canyon and the river below as well as Signal Mountain to the north. There are also great wildlife - particularly big horn sheep, which live in the canyon - viewing opportunities here.