There is much to be discovered in Bend. If you only have a day, here are my suggestions. Walk a bit of the Deschutes River Trail, in town. Visit a few of our famous breweries – I suggest Crux, Bend Brewing Co. and Worthy. Walk through Drake Park (the leaves should be changing, and beautiful, then). Drive to the top of Pilot Butte to see the amazing view. Visit downtown and eat at Zydeco or McMenamins Old St. Francis School.
Also, from Bend you can have an incredible daycation.