| The picture below shows a larger view of this Old Lost River Gorge New Hampshire Advertising Souvenir Celluloid Pin Back Button. The back is blank. The pin back button is not dated but it is old. It pictures the cascading mountain waterfall, boulders, and it is marked as follows: LOST RIVER GORGE
LOST RIVER, N.H. The pinback button measures 1-3/4'' wide. It appears to be in mint condition as pictured. Below here, for reference, is some additional information about Lost River in New Hampshire: Lost River Reservation
From Wikipedia, the free encyclopedia Cave of Lost Souls c. 1908 The Lost River Reservation (also known as the Lost River Gorge & Boulder Caves) is a series of caves in the White Mountains in Woodstock, New Hampshire, United States. Located 5 miles (8 km) west of the village of North Woodstock on New Hampshire Route 112, Lost River Reservation is set in Kinsman Notch. One of the White Mountains' major passes, Kinsman Notch lies between Mount Moosilauke and Kinsman Ridge at just under 2,000 feet (600 m) above sea level. Lost River Reservation is owned by the Society for the Protection of New Hampshire Forests. The Lost River is so named because the brook draining the southern part of Kinsman Notch disappears below the surface in a narrow, steep-walled glacial gorge. The gorge is partially filled with immense blocks of granite, through the spaces of which the brook cascades along its subterranean course until it eventually emerges and joins the Pemigewasset River, which flows southward from Franconia Notch. | 
