The perfect trail for city-dwelling hikers who like to sweat.. In Short This two-hour hike is a great workout without the hassles of joining an indoor gym or driving to the mountains. Mount Sanitas, nestled in Boulder's scenic skyline, is easy to reach. The hike offers either a steep, stair-like climb to the top, or a wider, less steep path. At the top (about a 50-minute climb), there are panoramic views of the mountains and the Boulder and Denver skylines.