Sources, dates and honest gaps

What the evidence means

Operator facts describe the mountain or services as the operator publishes them. They can establish a named learning area or a stated terrain figure. They are not independent testing of lesson quality or evidence of future conditions.

Historical observations need a metric, location, unit and observation period. Where the publisher does not state the averaging years, that limitation remains beside the result. History is not a live report or a forecast.

Editorial assessments explain how those facts may affect an itinerary. They are our reading of the evidence, not invented visits, quotations or personal skiing experiences. We do not publish star ratings, numerical suitability scores or a hardest-resort league table.

How to read a figure or missing field

A mountain figure is quoted with a source and checked date. Its scope matters: combined-domain figures are not relabelled as local mountain figures, and a geographic summit is not automatically a lift-served skiing elevation.

• “not verified yet” means an appropriate source and scope have not been established in this guide. It does not mean the feature is absent.
• Historical means the published period remains attached and is not silently updated to the current season.
• Conflicting evidence means we withhold the affected figure rather than choose a convenient version.
• User-entered estimate means a calculator output derived from the visitor’s inputs, not a market fact or resort quote.

We publish no resort prices or price ranges, and no cheapest ordering. An absent amount is not an inexpensive resort. A network listing is not a complete pass entitlement.

The source register

All dates below are editorial checks in Europe/Stockholm. An undated mountain specification is not a live opening count. These entries document the research, not an automated monitoring promise.

For the numeric monthly snow table, see snow by month. For each terrain quotation and its scope, see the individual resort guide. The calculation formula is defined on the calculator method page, rather than sourced from resort marketing.

When sources disagree

The reviewed material included inconsistent trail counts at Winter Park, expansion/area descriptions at Deer Valley, lift information at Whitefish and snowfall units in some mountain pages. Some Ikon destination pages showed a newer season heading alongside older blackout dates. Those affected counts, conversions and access calendars have not been used to make recommendations.

The Copper homepage’s opening notice also differed from its about page. We did not choose a confirmed season date from that conflict. Readers should check the current operator information for any date-dependent decision.

If you spot a discrepancy, send the page URL and the relevant source to info@skiresorts.app. Please distinguish an operator correction from a personal trip observation; both can be useful, but they are different types of evidence.