From Midtown Manhattan:
Train: From Grand Central Station take Metro North Hudson Line to Scarborough Station. The McGlew & Tuttle building is adjacent to the station.
Car: FDR Drive North to Willis Ave Bridge. Bear Left after bridge onto NY State Thruway-Major Degan Expressway (I87). Take last exit (exit 9) before the bridge (Tarrytown). Go right on rt9 for apprx. 5 miles until the Scarborough Presbyterian Church in on the right. Go left at the light onto Scarborough Station Rd. Go to the river and the McGlew and Tuttle building will be in the Scarborough train station parking lot.