Cottonwood Paper Mill, Stone industrial building in Cottonwood Heights, Utah.

The Cottonwood Paper Mill is an abandoned stone structure at the mouth of Big Cottonwood Canyon in Cottonwood Heights, Utah. A tall square tower with a shallow pyramidal roof and small windows near its top stands on the left; to its right is a gabled section. The walls are pale grey and tan stone, the roofs reddish-brown, and a long low light-coloured stone wall with rectangular openings runs along the front.

Built in 1883 for the Deseret News under Henry Grow's direction, the mill ground logs from nearby canyons and old rags into pulp, yielding up to 5 tons of paper a day. Sold in 1892 to Granite Paper Mills Company, it burned on April 1, 1893, leaving only a stone skeleton. Partially rebuilt in 1927 as the Old Mill Club dance hall, it later hosted rock bands, a haunted house and a craft boutique before being condemned in 2005.

After 1927, the building became a dance hall known as the Old Mill Club, drawing people from towns across the region for regular evening events. By the 1940s, it had become a gathering point that many families from the Salt Lake Valley remembered well into old age.

The building was condemned in 2005 and is not open to visitors, with barriers in place to prevent entry. Its position right at the canyon entrance means the exterior can be seen clearly from the roadside without needing to leave your car.

When the fire broke out in April 1893, many residents assumed the alarm was an April Fools' Day joke and ignored it, allowing the flames to spread before anyone responded. It is one of the few recorded cases where a date on the calendar directly affected how a community reacted to a real emergency.