Started in Borovec and took the long way up. Scrambling the ridge where possible. Excellent day trip, but long and strenuous.
Borovec - Musala hut - Ireček - Malka Musala - Musala - Ledenoto Ezero - Musala hut - Borovec. Climbed the crest of the ridge wherever possible, fun scrambling (II-III UIAA), 14 hours car to car, great day!