One last note, Laura, because I continued to search for more information about this.
As Buck had stated, you could try collecting human urine and putting itaround the area because we are the bigger predator. It maynot work because as stated, if the mountain lion wants his prey, he/shewill get it no matter what.
Other things people have tried is tokeeppredatorsawayareammonia,garlic, and sour buttermilk.
You'd have to replenish all of the above as the heat will evaporate them.
-Carolyn