Rainbow Ski Area is one of the smaller fields in the northern South Island, with around 50 hectares of beech-forest-fringed slopes between 1,540 and 1,760 metres. The 220-metre vertical is modest, and its 15 runs are mostly gentle to moderate: 25% beginner, 55% intermediate and 20% advanced, with nothing rated expert. Five T-bar-style surface lifts serve the entire mountain, so the layout stays simple and the lines of sight are short. It is a low-pressure mountain where the appeal lies in space, light crowds and the fact that everything sits within easy reach of a single base area.

Intermediate runs make up more than half of the terrain, and these are the best of the mountain: open, rolling pitches where skiers can link turns without much interruption. The advanced slopes are shorter and steeper but still brief, so experts will exhaust the mountain quickly. A small terrain park near the base gives freestyle skiers a place to practise. Rainbow suits families, learners progressing beyond the nursery and relaxed intermediates in the Nelson Lakes region who prefer a friendly, uncrowded day to chasing vertical. Visitors seeking big descents or long runs will find them elsewhere on the island.

The 2026 season operates 2 August to 20 September, a seven-week window typical for northern South Island fields at this elevation. Historical seasons run late June to early October depending on snow conditions, though recent variability has seen shortened windows. The 2025 season was cancelled entirely due to insufficient snowfall. Rainbow opens later than Canterbury fields further south, with August providing the most consistent cover.

The field averages 2 metres of annual snowfall, modest by New Zealand standards and supplemented by extensive snowmaking on main trails. The basin's south-to-southeast aspect at 1,540-1,760 metres preserves snow quality through mid-season but limits accumulation compared to higher-elevation operations. Westerly weather systems deliver the best snowfall, with 300 centimetres recorded in strong seasons and visibility improving on the east-facing slopes after fronts clear. Base depths fluctuate significantly with thin early-season cover common.

July and August deliver peak conditions when snowfall aligns with cold temperatures, whilst September sees spring softening and reduced operating hours. Mid-week visits from late July through mid-August offer optimal snow quality and minimal crowds, with school groups dominating weekday mornings. The field operates predominantly as a day-trip destination, with weekend visitor numbers from Nelson and Blenheim swelling compared to near-empty weekday slopes.

The Atomic Rainbow Masters race event runs annually in late August, comprising giant slalom and slalom races organised by the St Arnaud Ski Racing Foundation. An end-of-season Slush Cup in late September marks the close with pond-skimming attempts across slushy lower slopes. No night skiing operates. The club's limited snow reliability and short season make pre-trip snow report checking essential, with closures possible during warm spells.