Lake Gregory is an artificial lake and recreation area nestled in community of Crestline of the San Bernardino Mountains.
The area originally known as Houston Flat, was developed by a Redlands citrus grower named Arthur Gregory, who bought and developed the land with the intention of creating a small resort community from the waters of Houston Creek that previously drained into the tributaries of the Mojave River. Mr. Gregory was also instrumental in creating the Crest Forest County Water District, which in turn, proved to be the entity that would foster the development of the area.
Today, the Lake Gregory Regional Park provides numerous recreation opportunities, such as swimming, waterslides, and fishing, in addition to a walking trail that encircles the lake. The regional park is also often the site of major holiday celebrations, such as the Crestline Independence Day celebration.