Rick - I heard of someone doing Skyline twice on the same day, but cant remember who it was. Stan was saying that he thought it was possible to do it three times in one day time wise, but he wasnt volunteering yet because of the weather.
Tina - Alan K did Baldy three times in one day from Manker Flats and his son Eric four times (See What are you doing on June 30 - in the California other areas section) for a trip report.
Sid Davis hiked San Jacinto 643 times (wikipedia) but mainly from the tram.
He climbed Cactus to Clouds before the tram was built.
