Deer Creek campground is about 3 road miles from the Trailhead. I believe there are only 8 spots there. Rampart Pass is not where the trail goes up out of Open Creek into Rampart Creek..... I doubt you can climb up to where the map says "rampart pass". There is an old trail out of Silvertip, into Pass Creek, another old trail crosses from Pass Creek into NF Butte Creek. I've seen a partial of a trail going out of NF Butte Creek to Deer Creek Pass. (we will be over that part Aug 2, our trip starts Aug 1 at Deer Creek TH). From Shoshone Pass to headwters of NF Yellowstone is good tundra walking...Tstorms could be a problem). Not sure you can get around Thorofare Mtn without dropping into the NF Yellowstone, then climbing back over ..... Thorofare Mtn (as others) are strange tuff / dirt composite and terrible to hike on.... Dont know where Boulder Basin TH is? At the USFS South Fork Work Center? Or are you talking down by the campground at the end of the road. There is a large parking area there at the end of the road, where the SF trail starts. Its a long hike up the SF Shoshone to Shoshone Pass, about half was burned in 2013.
You realize you are talking about 110 mile? ...... about 9 miles/day average. Thats not too bad of mileage days, more than I like to plan though.
A lot of food to pack. Is prime Griz country. From Shoshone Pass to Thorofare, not much to hang food on...you'll need a Ursack. Younts Peak area should have Griz looking for moths then too.
Good trip though..........
Yeah, the Boulder Basin Trailhead & S Fork Work Center are the same place. The trailhead on the west side of the river near Cabin Creek would be shorter, but that would require a major river ford. I don't want to attempt that this early in the season (7/20). The Boulder Basin / S Fork Work Center Trailhead is actually 11 miles from Deer Creek Campground by road. I have a friend that will probably be able to shuttle me, but he isn't certain yet. If that falls through I would seriously consider breaking this into two trips. The first would start the same as my original plan but then I would descend the Marston Creek Trail and backtrack 19 miles along the S Fork Shoshone River. The second would be up from Deer Creek Campground and back the same way, with 5 days to check out Thorofare Creek, Open Creek, etc. I'm actually considering this anyway since it would be easier, but I'd have to leave a lot of stuff out.
I walked the Continental Divide from near Marston Pass (Lost Creek) to Bonneville Pass in July of 2022. It was fantastic - part of the inspiration for this trip is simply to do that again. Thunderstorms are my biggest concern with that. Last time we got lucky with the weather, although we did alter our route to come out a day early ahead of some approaching storms. Most of that area you can get off the very top pretty quickly, but not below treeline. I'll check the weather forecast each day before and during the trip.
For food I will carry a bear canister and hang the excess. One flaw is that I won't be able to fit all of it in the canister before I get above treeline, so I'll need to get creative with the extra.
Getting from the headwaters of the S Fork Yellowstone to Thorofare Creek will be the crux of the route. Yes, I'm planning to drop into the North Fork Yellowstone River first, then up and over the ridge to the east, and then down into the upper part of Thorofare Creek. Joey did that on one of his trips - I need to watch that video again. I see one route that looks reasonable on the map. I'll post maps of my planned route for that section below.
If everything goes according to plan I will be coming out at Deer Creek Campground on 8/1, so I may pass you going the other way. I'll probably be the only human that you see that isn't on a horse. I'll probably be looking pretty feral by then, so don't be alarmed.