Hello! I have been in Duluth for about 20 years and can say that this is pretty much as good as it gets for a midwest outdoor town. Trail access throughout the city is incredible for hiking, biking, skiing, and more. We also have a lot of climbing in town, as well as an hour or two away.
I personally have found building community relatively easy if you are outdoorsy, but others have said the opposite, so maybe I got lucky?!
Many yoga studios in town, pick your style and there will be something for you.
Conservation corp, City of Duluth, the county, EPA, etc for jobs.
Again, trails absolutely everywhere, many of them full of dogs, so nothing really stands out as it's all meeting that need. :)
Feel free to email if you'd like to dive in deeper with any questions! Cheers!