You guys are lucky. All I have is some 8 x 8 ft space. I asked my dad for 1/2 the yard and he said no. But I said it would be less to mow, he still didn't like the idea. But If I had the space, I would want it to be like a motocross track. Triples and big flat jumps. I like the jumps where you go high and far, but land on a smooth down ramp. Then Of course a table-top, some woops for sure. And then a very technical section. Meaning that if you don't get the jumps right, you will get very messed up. It does doubles and triples for a while, but at the end theres a jump that launches you high, but not very far. And then theres a nice big smooth down ramp. I get a lot of my ideas from watching motocross racing, watching offroad rc racing, and me riding on my dirtbike. THere also has to be a straight away some where too. Also dips and drops are cool. Like you go up a ramp, and then land on something about 5ft off the ground, then keep going and and jump off and land on another down ramp. My track is kind of like this. But If I had a big space, at least like 30 x 30ft, then I would have my track somewhat like this.