The Wilderness 40 is an American sailboat, that was designed by Gary Mull and first built in 1980.^{[1][2][3][4][5]}

The Wilderness 40 is a development of the 1979 Wilderness 38.^[1][5]

The boat was built by Wilderness Yachts in Santa Cruz, California, United States, who built at least five examples, although the design is now out of production.^[1][6]

The Wilderness 40 is a small recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, an internally-mounted spade-type rudder and a fixed fin keel. It displaces 9,000 lb (4,082 kg) and carries 3,969 lb (1,800 kg) of lead ballast. The boat has a draft of 6.50 ft (1.98 m) with the standard keel.^[1][2][5]

The boat is fitted with a Japanese Yanmar diesel engine.^[1][5]

Wilderness 40 serial numbers 1 to 4

Early serials with a length overall of 40.00 ft (12.19 m) and a waterline length of 32.00 ft (9.75 m). PHRF racing average handicap of 87 with a high of 87 and low of 87. It has a hull speed of 7.58 kn (14.04 km/h).^[1][2][5]

Wilderness 40 serial numbers 5 and on

Later serials with a length overall of 38.50 ft (11.73 m), a waterline length of 32.00 ft (9.75 m) and a 3 ft (0.91 m) taller rig. PHRF racing average handicap of 81. It has a hull speed of 7.58 kn (14.04 km/h)^[7]

• List of sailing boat types