Here is the full list of all 42 Horse Club Adventures 2: Hazelwood Stories achievements.
Win at least one medal on all the race courses
Earn all stickers
Win at least one medal at all the balloon games
Win at least one medal at all the Western races
Win at least one medal for all the dressage movements
Win at least one medal when you bring all the animals in the shed
Collect all golden horseshoes
Complete Don Quijoe's sidequests
Complete Nayla's sidequests
Complete Mrs. Jones's sidequests
Find all the apples and give them to your horse
Complete Mrs. Kramer's sidequests
Play the story to the end
Win the photo contest
Bring the photos to Daniel
Get Barky as riding companion dog
Make friends with Barky
Win at least one medal when you bring the sheep in the shed
Follow the dog to Jimmy
Find all places
Find Arun's animal shelter
Win at least one medal at a Western race
Set up the Western riding grounds
Bring your horse safely across the swamp
Rescue Lilly from the barn roof
Find the farm
Find the wild horses
Find Jack's cabin
Stay overnight at the campground
Find the campground
Find the caravan
Find the stables
Win at least one medal at a balloon game
Be the new face for Anna's collection
Find the lighthouse
Win at least one medal for a dressage movement
Give your horse ten apples
Win at least one medal on a race course
Find the Cups & Saddles Riders Café
Take part in the photo contest
Find Hazelwood
Learn to ride