Discover a rare opportunity to own a substantial property tucked into Portland's Northwest hills near Forest Park. This .48 acre lot consists of three parcels and is believed to be the largest combined property with the least amount of sloping in the Waldemere subdivision. Zoned R7, the property offers single family or multi family development potential. There are no other homes located on Mackay and this lot is at the end of the road, where Firelane 9 begins. Willamette river and territorial views. The existing concrete wall is the remnants of the Waldemere Reservoir, historically used for fire suppression in the area until water main systems were integrated. Natural gas, water, sewer, electricity available in vacinity. A nearby PGE transmission reliability project is currently under land-use review, with a public hearing scheduled for October 14th, 2026. The proposed project would extend electric service in the surrounding area. Buyer to perform all due diligence regarding zoning, property lines, utility availability, developmental potential, permits with City of Portland.