Heber Down Conservation Area, Protected natural area in Whitby, Canada.

Heber Down Conservation Area is a protected natural space near Whitby, Ontario, made up of valleys, wetlands, and forested land. The site has a network of trails with both natural surface and paved sections, open to walkers and cyclists.

In the 1910s the Canadian Northern Railway built a Toronto–Trenton passenger line across the area, and a bridge over the Devil's Den gully was finished in March 1910. The bridge is gone, but its concrete abutments and piers remain. The gully got its name in the late 19th and early 20th century, when horse thieves used it as a layover and locals blamed the noise on the Devil.

A deep gully cutting through the area was used as a layover by horse thieves in the late 19th and early 20th centuries. Locals heard the noise of thieves and horses and believed the Devil was holding court there, so the gully became known as Devil's Den.

The area is reached from Lyndebrook Road, and parking is available on site. Trails with natural surfaces can get muddy after rain, so sturdy footwear is a good idea before heading out.

A deep gully cutting through the area was used as a layover by horse thieves in the late 19th and early 20th centuries. Locals heard the noise of thieves and horses and believed the Devil was holding court there, so the gully became known as Devil's Den.