U of MN East Bank, theres a ledge spot thats pretty spacey and good flat, the spot itself is elevated so theres stairs leading up to it; just look up Northrup (name of the building).
Elliot skatepark is near the outskirts of downtown. pretty mellow park, but it does get packed full of art students.
There is a mellow hillbomb near the guthrie theater next to the river in Downtown. theres a mini fire hydrant on the sidewalk of said hillbomb.
Just near the guthrie theater, theres a big building called the Depot and theres a ride on train tracks.
Shitty timing tho, the city just torned down these parking ramps just a block over from the government center which had a waxed curb, and a curb up platform with smooth ground which is perfect for manual tricks