Here is the full list of all 72 Grand Mountain Adventure: Wonderlands achievements.
Make gold on one challenge on Hirschalm
Beat all gold scores on Hirschalm
Catch all secret skipasses on Hirschalm
Beat all Double Diamond scores on Hirschalm
Unlock all lifts on Hirschalm
Discover all trials on Hirschalm
Make gold on one challenge on Waldtal
Beat all gold scores on Waldtal
Catch all secret skipasses on Waldtal
Beat all Double Diamond scores on Waldtal
Unlock all lifts on Waldtal
Discover all trials on Waldtal
Make gold on one challenge on Elnakka
Beat all gold scores on Elnakka
Catch all secret skipasses on Elnakka
Beat all Double Diamond scores on Elnakka
Unlock all lifts on Elnakka
Discover all trials on Elnakka
Beat all gold scores on Dalarna
Catch all secret skipasses on Dalarna
Beat all Double Diamond scores on Dalarna
Unlock all lifts on Dalarna
Discover all trials on Dalarna
Make gold on one challenge on Gaupefjord
Beat all gold scores on Gaupefjord
Catch all secret skipasses on Gaupefjord
Beat all Double Diamond scores on Gaupefjord
Unlock all lifts on Gaupefjord
Discover all trials on Gaupefjord
Make gold on one challenge on Rotkamm
Beat all gold scores on Rotkamm
Catch all secret skipasses on Rotkamm
Beat all Double Diamond scores on Rotkamm
Unlock all lifts on Rotkamm
Discover all trials on Rotkamm
Make gold on one challenge on Saint Luvette
Beat all gold scores on Saint Luvette
Catch all secret skipasses on Saint Luvette
Beat all Double Diamond scores on Saint Luvette
Unlock all lifts on Saint Luvette
Discover all trials on Saint Luvette
Make gold on one challenge on Passo Grolla
Beat all gold scores on Passo Grolla
Catch all secret skipasses on Passo Grolla
Beat all Double Diamond scores on Passo Grolla
Unlock all lifts on Passo Grolla
Discover all trials on Passo Grolla
Make gold on one challenge on Ben Ailig
Beat all gold scores on Ben Ailig
Catch all secret skipasses on Ben Ailig
Beat all Double Diamond scores on Ben Ailig
Unlock all lifts on Ben Ailig
Discover all trials on Ben Ailig
Make gold on one challenge on Pinecone Peaks
Beat all gold scores on Pinecone Peaks
Catch all secret skipasses on Pinecone Peaks
Beat all Double Diamond scores on Pinecone Peaks
Unlock all lifts on Pinecone Peaks
Discover all trials on Pinecone Peaks
Make gold on one challenge on Charyn Canyon
Beat all gold scores on Charyn Canyon
Catch all secret skipasses on Charyn Canyon
Beat all Double Diamond scores on Charyn Canyon
Unlock all lifts on Charyn Canyon
Discover all trials on Charyn Canyon
Make gold on one challenge on Mount Fairview
Beat all gold scores on Mount Fairview
Catch all secret skipasses on Mount Fairview
Beat all Double Diamond scores on Mount Fairview
Unlock all lifts on Mount Fairview
Discover all trials on Mount Fairview
Make gold on one challenge on Dalarna