EVENTS
The Clustered Spires High Wheel Race: https://www.highwheelrace.com/
Tour De Frederick: https://www.tourdefrederick.com/
ORGANIZATIONS / CLASSES
Frederick Pedlars: http://frederickpedalers.org/wp1/
Frederick County Biking Group FaceBook Page: https://www.facebook.com/frederickcountybikingcyclingclub
Active.com site shows classes in the area:
http://www.active.com/frederick-md/cycling/
TRAILS
Within Frederick city, check out the Frederick History Bicycle Loop website and pdf of city streets with historical significance. http://www.visitfrederick.org/frederick-history-bicycle-loop
Western Maryland Rail Trail: http://www.bikewashington.org/trails/wmrt/wmrt.htm
Bike Maryland website: https://www.bikemaryland.org/resources/riding/trails/
Frederick County Heritage Bike Tours: http://www.visitfrederick.org/what-to-see-and-do/frederick-county-heritage-bicycle-tours
MapMyRide allows you to search for Bicycle trails in Frederick MD. It describes the miles, elevation and shows the route. Check it out! http://www.mapmyride.com/us/frederick-md/