| Registry Numbers | US 171, WA 507 (view other lookout sites in United States, Washington) |
| Date Registered | January 2, 2026 |
| Nominated by | Bryony Melcher |
| Location |
Gifford Pinchot National Forest Skamania County, Washington |
| Coordinates |
N 46° 01.664' W 121° 36.735' (view using Google Maps) N 46° 01' 40" W 121° 36' 44" N 46.027730° W 121.612250° |
| Elevation | 4,366 ft (1,331 m) |
| Removed | by 2025 |
| National Historic Lookout Register | US 188, WA 23 |
| Administered by | U.S. Forest Service |
| Cooperators | Mt. Adams Ranger District |
Twice featured in National Geographic Magazine, Flattop Mountain Lookout in Washington's Gifford Pinchot National Forest had a stunning view of Mt. Adams. The two story ground house with 12' x 12' cab featuring slanted solid glass windows, was to have been a prototype replacement for the standard U.S. Forest Service lookout in the Pacific Northwest, but the relatively mundane R-6 flattop design won out.
This tower was disassembled by 2025.