To Cass Park/Union Fields:
From Thruway - Get off at exit 41 and ask booth operator for directions to Rtes. 5/20. Turn East onto Rte 5/20 for 50 yds. and turn right onto Rte 89 South. Cass Park is 40-45 miles down Rte 89 on your left. Look for the hockey rink just past the Hanger theater.
From Rte 13 (North or South) - Look for signs to Rte 89. Turn (right if coming from the North; left if coming from South) and proceed over short bridge. Turn right immediately after bridge onto Rte 89. Cass Park is one mile on right.
From East on rte 79 - Stay on Rte 79 through city. Take rt onto Rte 13 (Meadow St.) and take first left onto Rte 89/96 (Buffalo St.). Go over short bridge and turn right onto Rte 89. Cass Park is one mile on right.
From West on rte 79 - At bottom of long hill into Ithaca go over one bridge and take next left onto Taughannock Blvd. Go straight ahead following signs to Rte 89. Cass Park is one mile on right.

To Ithaca High School:
From North - Take Rte 13 to bottom of long hill into Ithaca. Get off at exit at bottom of hill (Stewart Park). Turn right off exit ramp and right once again at stop sign. Take 2nd right (first right is one way exit ramp) onto Cayuga St. Ithaca High is second school building on your left. Turn left into parking.
From South - Take Rte 13 through city and exit at Stewart Park. Turn right off exit ramp and immediate right onto Cayuga St. Ithaca High is second school building on left. Turn left into parking lot past tennis courts.
From East on Rte 79 - Stay on 79 to the Ithaca Commons. Turn right onto Aurora. Stay on Aurora until it ends and then turn left. At second traffic light turn right onto Cayuga St. Ithaca High is 1/4 mile on right. Turn right into parking lot just before tennis courts.
From West on Rte 79 or from North on Rte 89 - take either route to Rte 13 (Meadow St.) and turn left onto 13 north. See directions above "from South on Rte 13"

To Dryden High School:
From North/South NY Rte 81 to Homer Exit 12. Take Rte 281S through Cortland. At A&W, Rte 281S turns into Rte 13S. Follow signs for Rte 13 S into Dryden past Tompkins Cortland Comm. College (about 10m). Turn right at second light (Queen Diner on corner) onto Rte 38N. School is about one mile on the right. Pull into second main driveway.
From Ithaca Take Rte 13 N to the Village of Dryden. Turn left at the light (still Rte 13 N, Charlie's Diner at corner). At the next light, turn left onto Rte 38N (Queen Diner on corner).

Mapquest Info:
If you want to get directions from MapQuest , here is the necessary information:
Ithaca High School is at 1402 N. Cayuga Street, Ithaca, NY, 14850.
Dryden High School is at 118 Freeville Road, Dryden, NY 13053.