Maya will be unlocked at level 11, each level consists of 3 challenges which I will list below, most of these are self explanatory however I will add a note for any that are not.
Level 1
• Land a backflip
• Grind a bunting line
• Jump across a chasm
Level 2:
• Travel 500 m in one run
• Catch 5 Llamas
• Jump over 2 rocks in one run
Level 3:
• Pick up a coin magnet
• Travel 5,000 m in total
• Score 500 points in one run
Level 4:
• Spook 15 birds in one run
• Snowboard at night - You can wait in the menu until night time to start your run if needed, a full day cycle takes 7 minutes 30 seconds.
• Land a 2x combo
Level 5:
• Pick up a hover feather
• Land 3 backflips
• Rip 30 bunting flags in one run
Level 6:
• Stay airborne for 3 seconds
• Travel 1,500 m in one run
• Jump over 5 rocks in one run
Level 7:
• Backflip over a chasm
• Catch 15 Llamas in one run
• Collect 25 coins in one run
Level 8:
• Pick up a magnet and feather in the same run
• Ride through a village
• Land 25 backflips in total
Level 9:
• Ride through a forest
• Wake an elder
• Score 1,500 points in one run
Level 10:
• Escape an elder - The first elder is located around the 2500m mark, to escape him you'll need to land tricks for a speed boost and out run him until you reach a chasm where he will stop chasing you.
• Land a double backflip - Best done going over a ramp over a very steep drop.
• Backflip off a grind
Once you complete Level 10 congratulations, you just unlocked Maya! Simply select her from the character screen located on the main menu and the achievement will pop.
Maya can flip much faster than Alto, you will be using her for the majority of the rest of the game.