The 485-hectare (1,200-acre) regional park is situated approximately 30 kilometres (19 mi) north-west of Penrith and 25 kilometres (16 mi) south-west of Richmond.

The park is situated in a region that is part of the Great Escarpment formed by the orogeny that created the Great Dividing Range.

The park stretches 8.6 kilometres (5.3 mi) in a north-south direction from Yarramundi to Mount Riverview and Emu Heights and contains mountain bike, horse, and hiking tracks, and several lookouts.

Yellomundee Regional Park is distinct in that only about one fifth of the land has been modified and it contains large areas of natural bushland as well as cultural and historical sites.

The park protects areas of alluvial and riverine plant communities.