When you are headed up to Yellowstone area from the south or leaving Yellowstone to head back to Jackson stop at Flagg Ranch, just south of the South Entrance to Yellowstone NP it is another "last chance for miles" place to stop for gas... I always top off out there whenever I get the chance because the chances are few and far between... Flagg is an all in one, lodging, restaurant, camp store, and gas station operation...
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Places I forgot to mention earlier in Grand Teton NP:
Visit the concrete deck on the backside of the Jackson Lake Lodge in the AM - If you're lucky you'll catch a beautiful sunrise purple rosey alpineglow
on Mount Moran..., and see a few moose down near the lake...
Try driving up Signal Mountain (carefully) at either dawn or dusk (and try not to trip over all the professional photographers)...
Take the boat across Jenny Lake and watch the Exum Guides freak out the neophytes on the practice cliffs (the wet ledges [for extra credit] next to the waterfall once even had my complete attention 😉)... There's another short hike that continues up from there to a Jenny Lake and Jackson Hole overlook whose name escapes me... I think it's Inspiration Point... If you take it be sure to Not get off on the trail that parallels the valley when descending...🐿
Drive to the Cathedral Group Turnout preferably at dawn but definitely before 9am (so your photos won't look washed out)... It's one of the more spectacular views in the park and all you have to do is drive there...
Finally, if you need gear, clothes, maps or information (or at least where to go or who to ask to get it) head to Teton Mountaineering in Jackson... Great gear, great people... Not cheap, (a few good deals, on sale stuff, occasionally up on the upper floor...) but it'll be top of the line stuff, not CCP knock off crap...
It's an interesting place in its own right... Here's their website:
Servicing the outdoor community since 1971, Teton Mountaineering specializes in Alpine Touring, Split Boards, Telemark and Nordic skis. Our experienced staff can get you outfitted with the best gear for your backcountry pursuits.
www.tetonmtn.com
Just noticed this at the bottom of the Teton Mountaineering website:
www.mountainweather.com
Just remember that even with a solid forecast the mountains create their own weather every afternoon and sometimes earlier when you least expect it... (more longggg stories [mostly about lightning]😳)...
This official NPS site should have detailed info about hazards and area closures in the backcountry:
http://tetonclimbing.blogspot.com/?m=1
Could go on but I'm sure you'll find your own adventures... There's more than one for everyone out there...😉😎 🍺🇺🇸