Getting to Glenora without a car is a bit difficult.
The closest train stations are AMTRAK in Rochester and Syracuse. (http://www.amtrak.com)
The closest Greyhound bus station is in Geneva. (http://www.greyhound.com)
The closest car rental are in Geneva and Ithaca. (http://www.hertz.com or http://www.enterprise.com)
Once you are in the area with your own car (or rental), then getting to the sights is pretty easy. Routes 14 and 14A and Dundee-Himrod Road take you north and south while route 14A and Mud Lake Road take you west (the lake is on the east). These roads are all well-kept secondary roads that are a bit up-and-down as they wind their way. During the winter, only route 14 is permanently plowed. The others are salted or sanded often and plowed when equipment is available.