kudos to you running marathons my max was 12 miles.love hills my fav run 8.1 miles griffeth park off los feliz blvd to the tippy-top last stretch like going up a mattahorn. presently dont run but have for 25 years or so.used to also run with an old bud[he did over a 100 miles a week] of mine in queens past st johns university.students know this guy cause he runs whether rain,snow,or shine with no shirt on. go cydy.imo