Saddleback Junior is a mountain located in Franklin County, Maine.

The mountain is on the south border of the U.S. Navy Survival Escape and Evasion Training Facility (USSEAETF).

Saddleback Junior stands within the watershed of the Kennebec River, which drains into the Gulf of Maine.

The northeast and northwest sides of Saddleback Jr. drain into Redington Stream, then into the South Branch of the Dead River, and the Kennebec River.

The Appalachian Trail, a 2,170 mi (3,490 km) National Scenic Trail from Georgia to Maine, runs across the summit of Saddleback Junior, between Saddleback and Spaulding Mountain.