The Little Juniata River, sometimes called the "Little J," is a river in central Pennsylvania. It is a 35 mile (56 km) tributary of the Juniata River in the Susquehanna River watershed. It is formed at Altoona by the confluence of several short streams. It flows northeast in the Logan Valley at the foot of Brush Mountain.
At Tyrone, the river receives the southern Bald Eagle Creek, then turns abruptly southeast, passing through a water gap between the Brush and Bald Eagle Mountain ridges and enters the Sinking Valley where it receives the Sinking Run. Approximately 6 miles (10 km) northwest of Huntingdon, Pennsylvania, near Alexandria it joins Frankstown Branch Juniata River. This branch flows southeast past Huntingdon and joins the Raystown Branch Juniata River 3 miles (5 km) southeast of Huntingdon near Ardenheim to form the Juniata River.
In Colonial America, the river provided the farthest canoe-navigable headstream along the Alleghenies of the Juniata River, allowi (from [www.wikipedia.org](http://www.wikipedia.org/wiki/Little_Juniata_River).