Note: As of Monday afternoon (1/12/2015) Hopkins Point Rd is not plowed from Rt 65 to the lodge access. These directions get you to the lodge from Canfield Rd.
Easiest access to the lodge is from NY 65 on the west side of the park. Enter the park on Canfield Rd. Take the first right onto Hopkins Point Rd and follow to the lodge on the right.
From Springwater: Head north on Rt 15A for 23.5 miles. Turn right onto Sibley Rd (On 15A, you will go through Lima, then past Honeoye Falls 6 Rd and Honeoye Falls Five Points Rd. Sibley Rd is the next right after Honeoye Falls Five Points Rd). At the end of Sibley Rd (1.4 miles) turn left onto Rt 65N (Clover St). Continue on 65N through the traffic circle. 3.5 miles north of the traffic circle, turn right onto Canfield Rd. Take the first right onto Hopkins Point Rd. Then left on Pond View Rd. The lodge is on the right above the parking lot.
A Map of Mendon Ponds Park is available at http://www2.monroecounty.gov/files/parks/Maps/MendonPark.pdf. If you are coming from the east, you can enter the park on Canfield Rd or Pond Rd. Check the map for details.