Brigadier General John Forbes's Expedition of 1758 passed through the area that became Larimer Township, near Will's Creek, as they hacked Forbes Road out of the western Pennsylvania wilderness. (The reference that it was Major General Edward Braddock's Expedition of 1755 that passed through this area seems to have mixed up these two expeditions, since Braddock's Road passes through the extreme southwest corner of Somerset County.) Jonathan Long arrived in the area as early as 1783, and Richard Geiger was another early settler, possibly around the same time as Long. Daniel Lepley moved into Larimer Township in 1849 and built a gristmill here in 1850. The township was officially organized in 1854.