Jump AroundG 15

There are several places where you can unlock this achievement. A really good spot to get this achievement is during the motocross race called Enduro. It's a medium difficulty and medium length race. I posted a video that shows the exact location of the race. Once the race starts there will be yellow and white check points you drive through. At the 14th check point is where you'll jump a high ramp. You'll easily clear 140m. There is actually no avoiding it so it can't be missed. Just simply play this race.