About 4500 tonnes of dirt will be dumped on Canberra Stadium this week and fashioned into a high-speed, 29-jump supercross track.
The stadium's temporary transformation began yesterday under the watchful eye of track designer Jason Baker, ahead of Saturday night's fourth round of the Australasian Supercross championship.
Mr Baker, a United States native and former motocross rider, has designed each track in the series so far.
Last week's round in Perth was held at the tightly-confined Burswood Dome, and Mr Baker said moving to the more expansive Canberra Stadium had allowed him to build for speed.
''We've got a long start-straight this week, probably the longest start this whole series, which will be good for the riders, a lot of excitement on the first turn,'' Mr Baker said.
''There's a few more bowl turns, so they'll be able to take their speed through the corners a little bit better, and then there's also a set of tighter 90s and a couple of 45s in there as well, which helps the riders kick up to speed.
''It ends up being good racing, because you're not stopping and going so much.''
Riders begin on a 79m straight before easing left to tackle a series of jumps ahead of the first of three horseshoe bends.
The track also includes two 90-degree turns and three rhythm sections, with riders expected to clock 35-to-40sec lap times.
Mr Baker expected the course to be one of the toughest in the series so far.
''We've got two good-sized rhythm sections and also a smaller compact rhythm section right before the finish line, which none of the other tracks have really had,'' Mr Baker said.
''Each week I've tried to progress the level of the track, as the riders are getting a little bit more acquainted and a little more accustomed to the tracks, and getting their skills revved up.
''There's a couple of different things that we tried in the rhythm section this week, like step-up tabletop-type rhythms where you can either jump on top of it and then off, or jump before it and then over it. There should be a lot of passing going on and some good jumps.''
Since retiring from motocross riding through injury seven years ago, Mr Baker, 31, has designed tracks all over the world.
After he built Australian motocross legend Chad Reed's home track in Kurri Kurri, NSW, Reed asked him to design for the Australasian series. ''The catchphrase is US-style tracks, so Chad asked me last year to come over and be a part of the last five rounds,'' Mr Baker said.
''It went really well, so they asked me to come back this year.
''From a rider's standpoint, he trusts me, because he knows I used to be a rider. At the same time, he is the top of the sport right now, so having his final say or final approval is nice to have. He was definitely involved in what we built out here.''