I did all 3 days at Tejon in September on the same horse with no girth soreness. What a beautiful place to ride ! I use a Specialized Saddle with a mohair girth and acrylic pad, made for that saddle with keepers, etc. I remember all the steep hills ! My horse fought me to run all 3 days, so if he didn't get sore then... I have often packed a paper towel smeared with vaseline in a small ziploc bag for multi-days or longer, tougher rides just in case. You can always smear a little in their armpits ! ( Or wherever you may need it !)