Happy Jacks Natural Reserve is a large, free camping and day-use area situated along the bank of Bullock Creek in Lockwood, Victoria.

Set in a bushland environment, the reserve offers plenty of shade and open space suitable for tents, caravans, and motorhomes of all sizes. Visitors should be aware that the ground can become muddy after rain, and falling tree branches are a noted hazard.

Pets are permitted. Amenities including toilets, barbecue facilities, and a playground are located in the day-use area, a short walk from the overnight camping zone. A sports oval and picnic area are also part of the reserve.

Access to the overnight area is via Glen Road, turning right at Pearse Drive, while the day-use area and amenities are reached by turning left.