I know this.:>

at outside of town of calistoga is a saloon, the road going up to st hellen mt,right from parking lot of silverado saloon is a little barely visible trail. go up a steep incline and you well be on the trail that well take you high above calastoga. might walk over a barb down fench.Land owners don't mind. have a drink when get back in saloon to.:>

well then go to the cascades, a tower of rock ridges and buzards. then past to other side a view to pope valley. a long day treck . ever see the movie arrival:>

point being. I would take 12 grapefruit, 12 oranges. 2 two litters and a canteen and want water on return trip. some are this dumb. very hot can get 130 in july very dry. also a trail on mt hellen 5 miles or in napa louis stevensen 1700 poet author this trail very nice and wilderness trail lot of miles on this one. may be around thetown of st hellena not the mountain two different side of calastoga 20 miles from calastoga to town of st hellena. 5 miles to top of mt st hellena from saloon parking lot or do drop in. :>

enjoy..