A NUMBER of people living near the site of a proposed mountain bike park at Alstonville have joined forces to lodge a submission against the development.

The objection was lodged by solicitors on behalf of the Gap Road Action Group and 15 nearby residents who live on Gap Rd or Duck Creek Mountain Rd.

The submission states there has been no human activity on the site for "a long period of time" and that, as a result, the land has regenerated with dense bush and native plant species.

"Quality stands of remnant rainforest have survived and are flourishing, especially along the creek," the submission states.

"There has also been an explosion in populations of native fauna ... the subject land remains an important buffer from highway noise and the dust and noise from Stokers Quarry."

Residents say using the site for a mountain bike park would be a "radical and invasive change of use".

The development application is on public exhibition.