Plenty of local trails to choose from since 20 years ago! QC Area Trails Good stuff happening up in Dubuque, IA as well with TMBR. Interstate Power Preserve is a must ride if you're in the area. And even some lift serviced downhill trails (Farside Bike Park) opening in Galena, IL (1hr north of the QC) at Chestnut Mountain Resort.

Not sure about bike rentals though...