Antoine Peak consists of 1,296 acres of mountainous terrain on the northern edge of Spokane Valley. This conservation area was acquired in four phases between 2007 and 2019, with 50% of phases 1-3 of the acquisition being funded through Washington State Recreation and Conservation Office (RCO) grants.
With 360-degree views from its 3,373-foot summit, Antoine Peak Conservation Area provides unique recreational opportunities, protects critical habitat for the region’s large mammals, and preserves a critical wildlife corridor that connects the Spokane River Valley with Mount Spokane State Park.
There are three trailhead parking areas for Antoine Peak. The Canfield Gulch Trailhead ("East Trailhead") provides limited parking on the east side of Antoine Peak at 19516 E Lincoln Rd and includes some room for passenger vehicles and several horse trailers. The West Trailhead is located at 15501 E Brevier Road and has 11 passenger vehicle parking stalls, an ADA stall, and room for four trucks with trailers. Water (non-potable) is available. In 2021, Spokane County recently completed and opened the Trentwood Trailhead, located at 17711 E Wellesley Avenue. This trailhead features 20 paved parking stalls and a dedicated horse trailer parking area.
Check out this Geological study performed by the science department of Spokane Community College: Geology of Antoine Peak Conservation Area: A Limited Field Study.