Mini-bosses, or mini-boss jumps as the are usually referred to in the game, are special jumps or obstacles that only occur in some levels (randomized). Choose tracks that have a high stunt rating to have the best chances of having a level generated with one or more mini-boss obstacles.
Each world has its’ own unique mini-bosses that range in difficulty. Keep your eyes out for these landmarks and obstacles on the track in each world:
Highlands: Castles, ruins, and wooden ramps that jump over boulders
Forest: Wooden planks over rock pits and ramps that jump through wooden watchtowers.
Canyon: Wooden platform held up by scaffolding and jumps over windmills
Peaks: Towers with fire at the base and ramps that link to a short wooden walkway above a building
Most are fairly simple to complete, and an orange text description will pop up on screen when the mini-boss is successfully done.