Actually, this is quite simple and there's no need to go to a specific spot to do it. But you have to use a specific profile to make it possible (or at least less frustrating).
Use the biotic propulsion as your jump set. That way you'll have a little gain both in height and distance. There are two profiles with biotic propulsion: Biotic (what a surprise!) and Explorer. Select one of those.
All you need to do is find a cliff significantly high in any planet. Yes, you don't need to go to a specific planet, just have to find a good cliff. Just run to the edge, jump and dash forward.
Now, the key point is timing your jump and dash forward to attain enough distance...
The important part: when you press the
button,
you need to press and hold it all the way during the jump.
Don't tap it. Doing that will reduce significantly the distance of your jump. You also have to wait a little while before pressing
to dash.
Wait Rider starts to fall and immediatly dash forward, pressing and holding .
There's an alternative way for gaining speed before the jump. You can dash, jump and dash again. But it will make it more difficult as you can easily lose the edge of the cliff, falling down directly without even jump...
There's a little delay before the achievement unlocking. It may take up to 5 or 6 seconds...
I did it myself in a cliff next to the settlement on
Voeld, but I know others who did it on
Elaaden and even
Havarl...