In August 2025, the boards of directors of Teenage Christian Camp and Hillbrook Christian Association agreed to merge, forming a single entity: Hillbrook Christian Camp.

Staring in 1973, Teenage Christian Camp began using the newly built Hillbrook campground to host their summer youth camps.

In 1969, Harold and Della Duncan donated land to a newly formed Hillbrook Christian Association, Inc.

In the Summer of 1969, Teenage Christian Camp held its first Summer youth camp.