15 feet.

[garrett.]

aight so heres the deal. were probably going to move and the lot that were moving to doesnt have any house stanrted on it yet. so when they start to dig the foundation im gunna make them build like a 15 foot or so tall hill. now my question is, how much speed would that give me? like enough for a small jump ro what

 

[Lineskiah11]

it really depends on how steep they make it and how tall it actually is. it may be big enough for a tiny jump but just build some rails and you will have way more fun. i have a little hill in my backyard and all i have a bunch of different rails and stalls.

 

[_Joe_]

i have a hill in my backyard, and just a gues is that its 10 feet tall, and it gives me alot of speed, enough to come close on backflips off a jump, but its pretty steep, so if its steep, you'll get a ton of speed

 

[garrett.]

i know, im probably going to build like a 30 foot rail or box so i was just wondering how much speed it would give. and i would make them make it pretty steep too

 

[tribefan226]

i have a 15 foot hill. just works for rails. built a jump once but was not worth it at all

 

[anxju]

dont do jumps in your backyard

 

[alaskakid]

30ft is sick!