Old Weir Falls is a waterfall on Stoney Creek within Barron Gorge National Park, located roughly a 20-minute drive from Cairns CBD in Tropical North Queensland. Reaching the falls requires a walk of approximately 20–25 minutes from the trailhead car park.

The route crosses a small footbridge and follows a track running parallel to the creek, passing several secluded swimming holes along the way.

Set within one of the world's oldest tropical rainforests, the falls and surrounding shaded waterholes offer a cool, refreshing retreat from the region's intense summer heat.

Visitors should exercise caution during the wet season, as sudden storms and heavy downpours can rapidly raise water levels, making swimming and exploration hazardous.