I wouldn’t get hopes up of a massive trail build
The duration and lap length of cross country Olympic mountain biking must be as followed for both men and women:
- Race time: 1:30-1.45
- Lap length: 4-6km
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The UCI’s rules and regulations also states that “the course for an Olympic format cross-country event should use an attractive lay-out ideally in a cloverleaf design, to encourage easy viewing for spectators and any television coverage.”
The organiser must make the courses available and fully marked for training at least 48 hours before the start of the first race.
Double feed/technical assistance zones are “strongly recommended” and the course must be marked every kilometre by a sign indicating the distance remaining to the finish line.
The course should include a variety of terrain such as road sections, forest tracks, fields and earth or gravel paths, and include significant amounts of climbing and descending. Paved roads cannot make up more than 15% of the course.
The course must be wholly rideable even in difficult weather conditions.
For the Olympic cross-country races, the course must be marked out using stakes or banners and protected for its entire length.
The starting zone for the mass-start Olympic race must be at least six metres wide for at least 50m before the start line and at least metres wide for at least 100m after the start line.
Again XCO guide so it will be less but it’s a good starting place, TV access, short lap, probably 3-4km of singletrack needed?