were reinforced in the 1960s, lies south of the original route. The route continues southeast across the Cartwright Causeway, separating the eastern arm of Lake Scugog from the marsh. After approximately a kilometre (0.6 miles), the highway curves east and continues for to the end of the causeway. For the next , the highway travels straight to the east past farmland, then curves north near Blackstock. It intersects Durham Regional Road 57, which travels south to Bowmanville. The two routes travels north concurrently with for before Road 57 departs north towards Caesarea as Highway 7A gently curves east and passes through the former railway village of Nestleton Station. Returning to farmland, the highway enters the northern tip of the Oak Ridges Moraine and the terrain begins to undulate near the border between Durham Region and Kawartha Lakes. Eventually, the farmland transitions into forests and the highway dives into and out of glacial ravines; these form the headwaters of the Pigeon River. The route intersects Highway 35 approximately east of Nesleton Station; both highways travel south concurrently for before Highway 7A branches east and Highway 35 continues south to Orono and Newcastle. A carpool parking lot is also available at this junction. Highway 7A continues east through a valley-ridden region containing a mix of thick deciduous forests and farmland. Shortly after passing the northern terminus of City Road 32 (Porter Road), the highway enters the village of Bethany, where it crosses the Victoria Rail Trail and intersects the southern terminus of City Road 38 (Ski Hill Road) before curving southeast and entering Peterborough County. The highway curves back to the east and passes through a final ravine. It crosses through farmland before entering the community of Cavan, where it meets County Road 10. Approximately east of Cavan, Highway 7A ends at an interchange with Highway 115, which itself intersects and becomes concurrent with Highway 7 approximately northeast of this point, thereafter continuing into Peterborough. History The history of Highway 7A is largely connected to that of Lake Scugog, and has played an important role for over a century, although the highway was not designated until the 1930s. Joseph Bigelow, a businessman and later the Reeve of Port Perry and James Graham, Reeve of Scugog, played a significant role in the construction of two causeways across the lake – the Scugog and the Cartwright Causeways. These were gradually reinforced over the span