On April 11, 2002, about 1650 Pacific daylight time, a tail-wheel equipped Steele Steen Skybolt, N858RS, sustained substantial damage while landing at the Coeur d'Alene Airport, Coeur d'Alene, Idaho. The airplane is owned by the pilot, and was being operated as a visual flight rules (VFR) personal flight under the provisions of Title 14, CFR Part 91. The airline transport pilot, the sole occupant of the airplane, was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local flight. According to the pilot, he was landing on runway 23. He reported that shortly after touchdown, during the rollout, the airplane started tracking to the left of runway centerline. During his attempts to correct the situation, the airplane swerved to the right. The pilot stated he applied full left rudder, but the airplane continued to the right and the left main landing gear strut collapsed, resulting in substantial damage to the lower left wing. The pilot reported that there were no mechanical failures or malfunctions with the airplane that may have contributed to the accident.