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We ended up the last several days without the internet. Were actually sitting in a parking lot in Hill City right now just to get our internet fix. We ended up taking the 90 again after leaving The Badlands due to the steep winding roads and having to pull a 30 foot trailer. We’ve been in the Black Hills Forest for the past 3 days and are taking a smaller highway (can’t remember which) into Buffalo, WY tomorrow. The Route you outlined looks awesome and we will definitely passing through these lands again someday.

the route i gave you is not windy at all BTW....

I've made note and we may take that one our way back east. There were may things we didn't get to see that we still want to.