Rainbow Road is one of New Zealand's most iconic off-road routes, a scenic gravel run through rugged South Island backcountry linking the St Arnaud/Nelson Lakes area with the Hanmer Springs side. Originally built to service the region's transmission lines, it crosses Rainbow Station's private land, with steeper, river-hugging valleys at the northern end and more open country near Lake Tennyson and the Molesworth boundary.

Expect a well-graded but long gravel road with optional river and stream fords (bridges are available as an alternative), plus potholes on the southern section and rocky, loose going at the northern end where airing down helps. The scenery is the highlight: alpine peaks, native bush and picturesque valleys, with peaceful spots to stop, fish or picnic, and great camping near Lake Tennyson.

Access costs $60 per vehicle, paid in cash at the homestead near the northern end, where they often also sell local honey, so carry extra cash. Gates open daily 7:00am to 6:00pm.

There are no fuel or services along the way, so carry water, food and recovery gear. Bring insect repellent for the sandflies at some camps. Stay on track, leave gates as found, take rubbish out, and check the Rainbow Station website before you go.