Forzathons arrive in Forza Motorsport 7! The first event goes live today at 9:30AM PST and will be running for two weeks. There are two cars and a suit up for grabs:

• This is Forza Motorsport: Complete all Challenges to earn the '69 Ford Mustang Boss 302 Forza Edition.
  • Challenge 1: Complete 5 laps in Maple Valley in a Classic Street Muscle division car.
  • Challenge 2: Complete 5 laps in Dubai in a Track Toys division car.
  • Challenge 3: Complete 5 laps at Mugello in a Forza Touring Cars division car.
  • Challenge 4: Complete 5 laps at Prague in a GT Racing Reborn division car.
  • NOTE: many players reported issues with completing this achievement. According to Turn 10, this should no longer be a problem, so you should report it on the fm.net forums if it still doesn't work.
• Going the Distance: Complete all Challenges to receive the Austronaut Modern Driver Gear.
  • Challenge 1: Complete a race on Circuit de Spa-Francorchamps.
  • Challenge 2: Complete 3 Autocross events.
  • Challenge 3: Complete a race at the Nürburgring in a Porsche.
• Clean Sweep: Complete all Challenges to win the '95 Nissan NISMO GT-R LM.
  • Challenge 1: Beat a Rival.
  • Challenge 2: Complete 5 laps in a Modern Hot Hatch division car.
  • Challenge 3: Win a race in an Exotic GT division car.

The '95 GT-R LM was available for purchase through the specialty dealer during the first couple of weeks after the game launched. Interesting to see that the car is now available in a Forzathon, that might mean that some other specialty dealer cars will also be made available as Forzathon prizes.

As you can see there are different number of challenges for some of the achievements. Many users reported issues with completing the "This is Forza Motorsport" achievement (see also the thread on the fm.net forums). Turn 10 worked on diagnosing the problem and reported that it has been fixed.

[Update Nov 11: added links to Turn 10 tweet about fixing the issues with the first achievement]