Just fast on rest days, or don't climb those days. Go for a a short/easy hike or something. I do a lot of cardio. Some days I will burn 5000+ cal. I am absolutely unable to lose weight or restrict calories on those days because I always feel insatiable hunger.
Interesting - I can do 3000-4000 calories through cycling and get away with only a small protein rich meal (scrambled eggs + steak) after. Even today, another 2 hour mild session (appx 1000 cal) and have only had light breakfast, coffee + pie. Hunger is there, but not at the forefront at all.... unless I eat a few sugary meals in a row.
