Rusutsu spreads across three interlinked mountains and roughly 800 hectares in southwestern Hokkaido, with 37 runs falling 594 vertical metres from 994 metres to 400 metres. The grading is 30% beginner, 40% intermediate, 20% advanced and 10% expert. About 20 metres of dry snow lands here each year, and the lift system is large for Hokkaido, with seven quads, seven double chairs and four gondolas. West Mountain, East Mountain and Mount Isola all run on a single pass, and each has a different feel. That mix of groomed cruising and open trees is why Rusutsu appears on so many Japan itineraries.

Mount Isola is the highest peak and the serious end of the resort, with the long Isola Grand run of around 3.5 kilometres and Steamboat runs on the upper slopes. East Mountain mixes cruisers such as East Vivaldi with its steepest pitch of around 40 degrees, plus a terrain park. West Mountain is the family zone, with gentle terrain and night skiing, while the birch tree skiing on its right-hand side is mellow enough for newcomers. Sugar Bowl between Isola and East is a popular tree area. Intermediates who want trees and big days, and experts who like open glades, will both be comfortable here.

The 2025-26 season opens on 29 November and closes on 31 March, providing four months of operations across early, peak and spring periods. Early season runs from 29 November through 19 December with reduced hours until 5pm, regular season spans 20 December through 15 March with 9am to 8pm operations, and spring skiing continues 16 March through 31 March with earlier closing times. Night skiing operates from mid-December through 30 March with lifts running until 7.45pm on West Mountain's illuminated terrain.

Rusutsu averages 14 metres of annual snowfall with exceptional powder quality attributed to its inland position southeast of Mount Yotei, which blocks moisture-laden winds whilst maintaining consistent storm cycles. The resort's location near Lake Toya creates localised lake-effect enhancement during cold air outbreaks, and snow moisture content measures just five per cent, producing exceptionally dry powder that skiers describe as nearly frictionless. Base depths regularly exceed 170 centimetres by mid-January, and the 400-metre base elevation combined with north-facing aspects on East Mountain preserves snow quality through March.

January and February deliver peak powder conditions with storms arriving every three to five days and temperatures hovering between minus 10 and minus 15 degrees Celsius. December provides excellent early-season value with lower lift ticket prices and thinner crowds, whilst March offers longer daylight, warmer temperatures above minus 5 degrees and firmer snow surfaces ideal for carving. The resort experiences fewer wind holds than Niseko due to its sheltered valley position, and Mount Isola's eastern exposure captures morning sun whilst maintaining cold overnight temperatures.

The resort hosts seasonal programming throughout winter though details of major events were not specified in current schedules. Night skiing operates four hours nightly from 4pm through 8pm on West Mountain from mid-December, providing opportunities for après-ski followed by evening sessions under floodlights. The Freedom Park terrain park on East Mountain operates from late December through late March with progressive features from beginner boxes through advanced jump lines, refreshed regularly throughout the season.