80×156 Riding Arena with Attached Stall Barn — Sherwood, Oregon

An 80-foot-by-156-foot riding arena on a horse property in Sherwood, with a stall barn attached to one end — an ag-exempt build framed through an Oregon winter, first post to last screw.

The owner’s brief was year-round riding, and that drives everything about the design. The arena runs 80-foot clear-span trusses at an 18-foot eave, so the full 80×132 riding surface has sixteen-plus feet of clearance with no interior posts. The eave walls carry the ventilation design: the first 24 feet from each corner is closed to grade, and the middle 108 feet of each wall is an open 9-foot band fitted with gale shields — eleven stationary sections and seven sliding — so the owner can tune airflow to the weather instead of choosing between a sealed box and an open shed. Red walls under a white roof, with a T&G kick wall wrapping the riding surface.

The stall barn end is a full working facility: a wash rack with hot and cold water and washable wall lining, tie racks, a lined tractor bay, an insulated pine-finished tack room, and a 24×24 finished viewing room with its own bathroom and windows looking into the arena. Concrete runs through the aisleway and work areas — the arena floor itself stays footing, as it should.

Big arenas put weight into the ground, and this one is framed for it: 6×12 treated posts carry the 80-foot trusses on the eave walls, set on concrete pads with gravel and concrete backfill. Outside, the property got matching vinyl perimeter fencing and a three-bay covered composting setup — the unglamorous infrastructure a working horse property actually runs on.

Winter framing in the Willamette Valley means mud, short days, and rain gear. The photos tell that part honestly. The building went up clean anyway, which is the point of running a crew that has done this for decades.