Sunday River spreads over 870 acres (352 hectares) and eight linked peaks near Bethel, Maine, with 135 runs along about three miles of ridgeline. A vertical of 2,340 ft (713 m) runs from an 800 ft (244 m) base to a 3,140 ft (957 m) summit. Intermediate terrain leads at 36%, with 30% beginner, 18% advanced and 16% expert. Snowfall averages around 180 inches a year. A gondola, an eight-person chair and a six-person chair help move skiers between peaks quickly, which matters when the layout is this spread out.

White Cap is where the steeps and glades are, and White Heat is the resort's most notorious trail, a double black known as one of the longest, steepest and widest in the East. Barker and Locke Mountains hold the original advanced terrain, including the bump run Agony. Oz brings tight-tree double blacks such as Lost Princess and Flying Monkey, while Jordan Bowl has Rogue Angel and Blind Ambition. Sunday River suits every level, with intermediates and families well served and experts having several peaks to explore.

The 2025-26 season at Sunday River ran from 13 November 2025 to 26 April 2026, one of the longest seasons in New England at roughly twenty-three weeks. Average annual snowfall of around 180 inches, combined with extensive snowmaking across the resort's eight peaks, has built Sunday River's reputation as one of the Northeast's most dependable resorts for consistent conditions. Season dates can shift depending on early and late-season weather.

Midwinter, from December through February, typically brings the most reliable natural conditions across the resort's varied terrain. As an Ikon Pass destination with eight interconnected peaks, Sunday River draws substantial visitor traffic from across New England and beyond, with holiday periods bringing the heaviest crowds. Weekday visits generally remain calmer, particularly on the resort's more remote peaks.

The resort's early November opening date, among the earliest in the Northeast, reflects its substantial snowmaking investment built up through decades of expansion since the 1980s. This early and late operating window gives Sunday River one of the longest seasons in the region. School holiday periods bring particularly strong demand given the resort's extensive beginner and family-friendly terrain alongside its more advanced peaks.

Specific event programming beyond standard lift operations is not confirmed in available resort information. Boyne Resorts' ownership since 2018, alongside sister resort Sugarloaf, has supported continued investment in the resort's seasonal infrastructure. Sunday River's eight-peak layout means conditions and crowd levels can vary meaningfully from one part of the mountain to another on any given day.