Mammoth Mountain opening

Mammoth Mountain opening is a Kalshi series in the Climate and Weather category, ticker KXMAMMOTHOPEN. Kalshi lists 6 settlement sources: USA Today, Associated Press, Alterra Mountain Company, The Wall Street Journal, Reuters, the New York Times, and 2 additional prohibitions. Fee type: quadratic, multiplier 1. RulesWatch tracks 5 markets in this series, 0 open.

Series facts

Ticker

KXMAMMOTHOPEN

Category

Climate and Weather

Frequency

annual

Fee type

quadratic

Fee multiplier

1

Contract terms

Kalshi contract terms (PDF)

Certification filing

Product certification (PDF)

On Kalshi

https://kalshi.com/markets/kxmammothopen

First recorded

Nov 8, 2026

Kalshi last updated the series

Oct 20, 2026

Settlement sources

• USA Today
• Associated Press
• Alterra Mountain Company
• The Wall Street Journal
• Reuters
• the New York Times

Additional prohibitions

2 prohibitions, as Kalshi lists them.

1. Persons who are employed by any of the Source Agencies are not permitted to trade on the Contract.
2. Persons who hold any material, non-public information on the Underlying are not permitted to trade on the Contract.

Changes recorded

No change to this series is recorded. RulesWatch has compared it with Kalshi's listing every day since Nov 8, 2026.

Markets in this series

5 tracked markets, open first. Volume is 24-hour contracts at the last check.

Source: Kalshi's public API, read daily. The contract terms and the certification filing are Kalshi's documents, linked and not copied. See also the other series.