Roundhill sits on the southeastern slopes of Round Hill and southwestern faces of the Richmond Range within the Two Thumb Range, 32 kilometres from Lake Tekapo village in the Mackenzie Basin of Canterbury. The base area at 1350 metres elevation overlooks the turquoise glacial waters of Lake Tekapo, New Zealand's highest alpine lake, with panoramic views extending to Aoraki Mount Cook at 3724 metres and the Southern Alps spine. The ski field drains into the Coal River valley, surrounded by tussock grasslands of snow tussock species Chionochloa macra and Chionochloa rigida that are mowed on some runs to reduce snow depth requirements. The summit at 2133 metres near Richmond Ridge reaches above the scree line into high-alpine terrain, with the Ben Ohau Range visible to the southwest and Pacific Ocean glimpses eastward on clear days.

Lake Tekapo village lies 32 kilometres northeast via Lilybank Road, a sealed route along the eastern lake shore for 24 kilometres before joining the 8-kilometre unsealed access road to the base car park. The township of 400 residents sits at the centre of the Mackenzie Country on State Highway 8, positioned roughly equidistant between Christchurch and Queenstown. Tekapo serves as the gateway to the Aoraki Mackenzie International Dark Sky Reserve and features accommodation ranging from backpackers to hotels, plus cafes, restaurants and the historic Church of the Good Shepherd. Nearby ski fields include Ohau 50 kilometres south and Mount Dobson 70 kilometres southeast, all classified as quieter Mackenzie alternatives to busier Canterbury club fields near Christchurch.

State Highway 8 connects Tekapo to Fairlie 55 kilometres northeast, which links to State Highway 79 and State Highway 1 for Christchurch-bound traffic. Drivers from Christchurch follow SH1 south to the Orari junction, turn inland via Geraldine on SH79 to Fairlie, then continue southwest on SH8 through Burke Pass to Tekapo. From Queenstown, SH6 runs northeast to Cromwell before SH8 crosses Lindis Pass through Omarama to Tekapo from the south. Lilybank Road branches from SH8 on Tekapo's eastern edge, requiring snow chains for two-wheel-drive vehicles when conditions warrant, though the gradual gradient and wide gravel surface accommodate campervans and buses unlike steeper club field access roads.

Christchurch International Airport lies 225 kilometres northeast with driving times of 2 hours 45 minutes to 3 hours depending on route and conditions, served by domestic and international flights with car rental facilities on-site. Queenstown Airport sits 260 kilometres southwest requiring approximately 3 hours driving via Cromwell and Omarama on SH6 and SH8. Richard Pearse Airport at Timaru operates 100 kilometres east but offers limited commercial services. InterCity operates daily coaches between Christchurch and Queenstown via Tekapo, with the journey requiring 3 hours 25 minutes from Christchurch. No rail links serve the Mackenzie region, with private vehicle or coach transfer essential for accessing Roundhill from either major airport gateway.