Trailhead at 77 Valleyfield Street Location 77 Valleyfield StreetLexingtonMA Next Event Citizens for Lexington Conservation Walk: Explore Hayden Woods - May 17, 2026 - 2:00 pm - 3:30 pm Upcoming Events Citizens for Lexington Conservation Walk: Explore Hayden Woods - May 17, 2026 - 2:00 pm - 3:30 pm