The Pacific Crest Trail's Section H runs from the Bridge of the Gods at the Oregon-Washington border to White Pass near Mt. Rainier, passing by Mt. Adams along the way and through the rugged and remote Goat Rocks Wilderness. It is reputedly one of the easier sections of trail on the PCT, although it is far from resupply points. It runs for 147.5 miles, with 28,000 feet of elevation gain in the northbound direction and 24,000' southbound, including two 3,000' climbs (northbound) and a knife edge ridge.
The FKT route runs from trailhead to trailhead and takes place entirely within Washington. It does not include crossing the Bridge of the Gods or the short road section between it and the trailhead, to avoid giving an incentive to take risks on the narrow bridge crossing.
References:
https://www.wta.org/go-hiking/hikes/pacific-crest-trail-section-h-bridge-of-gods-to-white-pass
https://www.pcta.org/discover-the-trail/maps/overview-maps/
https://www.pcta.org/discover-the-trail/maps/pct-data/
