William Ashley left Fort Atkinson on November 3, 1824, to guide a supply train to the first rendezvous. He overtook twenty-five of his trappers on November 25th. These men had left earlier, taking with them fifty pack horses, one wagon and a team. The wagon was later abandoned due to heavy snow. Their route was up the Platte to its south fork, up the south fork to Cache la Poudre, up Cach la Poudre to the Platte, west to Pacific Creek, and down the Big Sandy, to their destination at the Green River. They arrived there on April 19, 1825.Gowans, Fred R. is the author of 'Rocky Mountain Rendezvous A History of the Fur Trade Rendezvous, 1825-1840' with ISBN 9780879051938 and ISBN 0879051930.