Fairly close actually. Maybe 3ish miles? Not exactly across the street but a short car ride or bike away. Could you walk? Absolutely. Not a short walk but maybe 15-20 minutes...?
Naropa is the center of everything. So yes.
Depends upon which Naropa; but on bicycle, with the trail system, you can get there easily.
Naropa University has a couple campuses around Boulder, so the answer isn't simple.
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