1. Find a location
This is the hardest step because land isn`t free.
Find an empty field, a vacant lot, a clearing in the 
woods or fix up old trails and hope nobody 
sees you. The farther away from human traffic the 
better. Chances are you`ll be trespassing no matter 
where you go. Try to keep things low-key and out
of sight. If you have to build near town make sure
that you find a spot that is not to close to the 
following: 
Old People ( They will annoy the shit out of you ) 
City Council Deports ( That's where they keep 
the dozzers and stuff). 
Police stations ( You don't want to spend a 
night in lockup ) 
Universties (they call the cops on ya and 
Bulldozze trails)

2. Checking the area 
Check the area around you before you and
your mates start digging, If theirs a hill behind 
you use it as a drop in (It makes you go faster
more quickly for the jumps which means
BIGGER AIR, And also makes it harder 
for the Council Dozzers to get in and wreck your jumps.
and that the dirt is easy to dig and compacts hard. 
Water is handy, the best time to build your jumps 
is just after it rains or all the time if your near a 
stream, river, or creek. 

3. Planning 
Now start planing what you want to build and 
where to build it, try to figure out what your
skill level is and what kind of jumps you would
like to be doing.If you`re stuck for ideas check 
out the Trails Section. When building your trails 
try not to make turns in you trails, If you do, make
long sweeping turns that hold your speed or you 
could make huge berms (berms aren`t that hard to
make just dig into with a slope that digs into the 
ground and goes a fare height.) 

4.Getting help
Now you need to get a heap of people to help 
dig your jumps. Try to get some mates in to help
and if you see people riding past invite them to
help and make sure that they all have a shovel or 
spade so it doesn`t take as long to build your jumps.
A wheelbarrow is very handy if you have the 
MONEY to buy one( well worth the investment )
it makes moving the dirt much easier. 

5. Digging
Now you can start digging your heart out till the 
sun goes down, then try to get lights so you 
can just keep going till you fall over. Then when 
the jumps are roughly how you want them you 
can start compacting them by whacking the jumps
with your digging tools while someone else pours on the 
water slowly (this is the time you want it to RAIN, 
yes I said RAIN,this makes the jumps hard.). 
Then roll a line with your bike tire so it`s flat to
your liking and you can see where your going to aim for. 

6.Start riding
When your jumps are hard you can start riding them, 
you have to fix up your jumps when they get big ruts
in them so just fill the ruts with dirt and compact them 
smooth. Now that you have made your Trails, 
Go have fun and bust some BIG AIR or yourself
which ever comes first.