This is our favorite, yet most challenging hike in Fiordland National Park. This demanding 8.4 kilometer or 5.2 miles return journey comprises 663 meters or  2175 feet of elevation gain. The trail first winds through a valley, followed by a steep climb to Black Lake, traversing rocky terrain, steep sections, and big slabs of boulders. Due to its exposed nature and rough terrain, Gertrude Saddle is only safely undertaken in dry conditions. The reward for the challenging climb is a unique alpine experience, with views of dramatic cliffs and a deep hanging valley.