Lake Champlain Bridge Guided Walk in Addison, at the Chimney Point State Historic Site 8149 VT Route 17W Addison, Sunday September 25th from 1:00 pm to 3:00 pm. Learn the history of what surrounds you as you walk across the Lake Champlain Bridge. Chimney Point site administrator Elsa Gilbertson and Crown Point site manager Michael Roets lead this guided round trip walk. Meet at Chimney Point. Rain or shine, dress for the weather. $6.00.