Here is the full list of all 16 Foreveracers achievements.
Complete a lap on the Sky Track
Complete a lap on all circuits
Race over 100 laps
You've driven 500 miles, and then driven 500 more!
Collect 100 presents
Find all hidden circuits
Complete a lap with each car
Destroy all snowmen
Destroy all cacti
Complete a lap in Gannenthu Village
Complete a lap in Canéuj Quarry
Complete a lap at Howe Aman Lake
Complete a lap at Weiei Mountain
Complete a lap at Thascot Swood coastal road
Complete a race at Langwaedoon
Complete the Canéun Run