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Mountaineer is a hard difficulty stamp in Club Penguin Rewritten. It could be obtained by climbing to the Mountain Top of the Toughest Mountain during the Mountain Expedition 2017, Penguin Games, and Mountain Expedition 2021. It could also be obtained by reaching the peak of the Tallest Mountain during the Festival of Lights.
|Party||Available from||Available until|
|Mountain Expedition 2017||February 26, 2017||March 10, 2017|
|Penguin Games||September 2, 2018||September 15, 2018|
|Festival of Lights||January 23, 2020||January 30, 2020|
|Mountain Expedition 2021||May 10, 2021||May 20, 2021|
- It was originally not meant to be available during the Festival of Lights. However, due to players' request, it was made available a few hours after the party started.