This case report describes the use of treadmill training without body weight support to improve walking speed in a child with diplegic cerebral palsy. The child was a six-year-old girl with spastic diplegic cerebral palsy. She walked short distances independently using a posterior support walker but was unable to keep up with her peers walking long distances. Speed of walking 50 feet and speed of walking from her classroom to the cafeteria (458 feet) were timed pretreadmill, posttreadmill, and 3 weeks following treadmill intervention. The GMFM-88 was administered pre- and posttreadmill intervention. Following treadmill intervention, the child's speed of walking increased and she was able to walk to the cafeteria daily with her peers. Improvements in the percent of maximum total score of the GMFM-88 were also observed. The outcomes of this case suggest that the use of short-term, task-specific treadmill intervention might increase a child's walking speed enough to increase their participation in the school setting. (Contains 4 tables.)