Cathedral Reserve is on the Mt Irvine Rd on the way out of the Mt Wilson village travelling towards Mt Irvine opposite the Cathedral of Ferns. It is a large open area with Liquidambers along the Mt Irvine Rd and rainforest behind the reserve.

The Reserve has two old pit toilets and two modern composting toilets which were installed by Blue Mountains City Council after many years of negotiation by the Mt Wilson Progress Association.

The reserve has been extended several times, giving picnickers and campers the choice of camping in the open or amongst the trees.

Bollards have been installed to prevent cars driving on the grassed areas and also driving into camping areas so these areas are protected. Car parking areas have been extended to cater for the large numbers of campers and picnickers who use the area.

Near the Cathedral of Ferns a path has been made so that visitors can park in Cathedral Reserve and walk to the Cathedral of Ferns without having to walk along the road. This a narrow road on a bend where it is difficult for motorists to see people walking along the road.

Recently a large number of open fireplaces with BBQ facilities have been installed by the Progress Association to aid campers and to discourage the lighting of fires in any other location. This destroyed the grass and increased the risk of bushfire at certain times of the year.

Many people camp or picnic at Cathedral Reserve. Camping is free and no booking is required. There are toilets, tank water (not suitable for drinking but can be boiled or used for other purposes), fireplaces, picnic tables and garbage bins. Remember to bring your own drinking water, firewood, warm clothes (it gets cold at night), toilet paper and your own camping gear.

Users are reminded to securely lock up any valuables during their stay.

Opposite Cathedral Reserve is the Cathedral of Ferns.