On January 22, 2004, about 1615 Pacific standard time, a Beech B36TC, N321JT, overran the runway during the landing roll at Montgomery Field Airport (MYF), San Diego, California. JLR Creative Enterprises owned and operated the airplane under the provisions of 14 CFR Part 91. The commercial pilot, the sole occupant, was not injured; the airplane sustained substantial damage. The personal cross-country flight departed the Big Bear City Airport (L35), Big Bear City, California, about 1530, with San Diego as the final destination. Visual meteorological conditions prevailed, and an instrument flight rules (IFR) flight plan had been filed. In a written statement, the pilot reported that she was cleared for the instrument landing system (ILS) approach to MYF, circle to land runway 10R. The airplane landed long and she applied brakes upon touchdown. The left main tire blew out and she attempted a go-around. The airplane overran the runway and veered to the left, resulting in the left wing colliding with a runway end identifier light. The airplane continued to the left and encountered a ditch filled with soft mud. The pilot did not report any mechanical problems with the airplane prior to the accident.