A dual gauge101⁄4 in (260 mm) / 71⁄4 in (184 mm) light railway was established in the park in 1992, originally as a temporary layout. A more permanent track was laid down in 1993, as the railway company was granted a three-year lease. Five years later, a longer lease was negotiated and construction began on the two stations, Eastleigh Parkway and Monks Brook. They were opened in 1999, although further work on the layout itself was carried out in 2000. A tunnel was added in 2003, and Eastleigh Parkway station was extended in 2005 with the addition of a café and shop.
In 2014 funding was approved towards the replacement of the current lakeside buildings with two new buildings with improved toilets and changing facilities, storage, offices and a multi-purpose function room. The estimated cost of the scheme is £2.5 million, of which £1 million had been allocated from the New Homes Bonus and £371,000 from the Eastleigh Local Area Committee. The new buildings were completed in late 2016.
Open Water Swimming has been run from the venue since at least 2010, and, as of 2016, is currently operated by HOWL Multisports.