November 1, 1922: "The high peaks of the Sawtooth range were decorated with white the result of a storm wave that precipitated rain in the valleys and foothills. On the Iron Mountain lookout 59 miles west of Hailey, four inches of snow were reported." (The Challis Messenger)
June 29, 1934: "Mr. and Mrs. Neil Platts are stationed at the Iron Mountain lookout for the season. Platts reports 21 as the lowest relative humidity reading recorded this year." (Twin Falls Daily News)
1938: A ground cabin built. (Kresek)
October 18, 1960: "J.H. Seaver, Twin Falls, has been awarded the contract to build a two-story pumice block lookout at Iron mountain, according to Russell Lyons, engineer for the Sawtooth national forest. The new lookout will have a storeroom on the ground floor with the lookout on the top floor. The lookout is located in Elmore county about 80 miles from Mountain Home. Lyons said Seaver plans to start work on the lookout building as soon as possible, and if the weather remains good, Seaver hopes to have the building completed this fall." (Times-News)
1961: A two-story, concrete block with R-6 cab. (Kresek)
National Geodetic Survey
DESCRIBED BY COAST AND GEODETIC SURVEY 1935 (EBL) ON IRON MOUNTAIN, ONE OF THE HIGHEST PEAKS OF THE SOLDIER MOUNTAINS, ON THE NORTHWEST END OF THIS RANGE, ABOUT 8 PACES FROM THE NORTHWEST CORNER OF THE LOOKOUT HOUSE AND IN MAGNETIC AZIMUTH 357 DEGREES.
TO REACH FROM FEATHERVILLE, TAKE ROAD UP THE SOUTH FORK BOISE RIVER FOR APPROXIMATELY 13 MILES TO A NARROW BRIDGE ACROSS THE RIVER, THENCE DOWN THE OPPOSITE SIDE OF THE RIVER TO BEAVER CREEK, OR BY FORDING THE RIVER 1/2 MILE ABOVE THE RANCH HOUSES OF MUGS HOWLAND, THENCE UP THE U.S. FOREST SERVICE BEAVER CREEK TRAIL TO THE IRON MOUNTAIN LOOKOUT HOUSE. THE TRAIL FOLLOWS THE TELEPHONE LINE. ABOUT A 5-HOUR HORSE PACK.