Mystery Park Soil Carbon Project

Mystery Park Soil Carbon Project is a soil carbon sequestration project located at St Lawrence, approximately 185km north of Rockhampton in Central Queensland. It was registered in May 2022 and originally covered 8,533.25 ha of the 12,000 ha "Mystery Park" property.

Soil carbon projects utilizing the 2021 Measurement and Models methodology involve securely storing carbon within agricultural soils. This is achieved by altering the stocking rate, duration, or intensity of grazing to promote soil vegetation cover and improve overall soil health, with the carbon levels being actively measured and modeled over time.

The St Lawrence coastal region is traditionally known for beef cattle breeding, backgrounding, and agistment operations. The environment features high rainfall for a Queensland grazing district, averaging approximately 1050mm annually, and typically consists of fertile coastal clay and loamy soils.

Owned by Rob and Ainsley McArthur since 2003, Mystery Park has progressively transitioned from traditional continuous grazing to an intensive, time-controlled regenerative grazing system. They currently run a herd of around 5,000 tropically adapted composite cattle. The McArthurs are highly regarded for their innovative approach to grazing, having recently trialed technologies like eShepherd virtual fencing collars to increase their pasture utilization and carrying capacity. Partnering with project agent Carbon Link Operations Pty Ltd, this soil carbon project aligns with their broader ecological and profitability goals. In April 2026, a project variation was registered, removing certain previously listed areas from the project boundary.