This short connector trail leads hikers from the Pacific Crest Trail to Waptus Pass.
It's only 1.8 miles from the junction of Waptus Pass trail to the Pacific Crest Trail, but it takes another 3.9 miles up the Tired Creek Trail to reach the junction, which is why the data for this hike is 6+ miles with all that elevation gain.
You can also access Waptus Burn trail from the other side of this ridge via the Waptus Pass trail, but the Tired Creek route is more direct.