How are players actually expected to climb Mount Hothead?

I just started playing yesterday but I have this thing where I absolutely CANNOT continue with quests unless I convinced myself I've explored the map to the best of my abilities. Ive unlocked every mailbox but the Reef and the Icy area!!

Anyway, i spent the last 30 mins or so climbing Mount Hothead after eating the stamina apple from that one quest, landing on any clipped area I could until I reached the top and it had me genuinely wondering how players are actually supposed to get to the top??!!