Katy Trail is best with tires a bit wider - I'd say 28s min, or wider to be safe in wet and/or soft spots.
Good flat road riding east of the Mississippi River in Illinois, slightly North & East of St. Louis. (forget the BF member from there).
I used to love the 20-30milers in west St Louis county, but that's down I-44 a bit.
Just spent some time in Grand Junction. Enjoy CO mtn highs!
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Vintage, modern, e-road. It is a big cycling universe.