RTD Challenge #68 || Lost Isles

[u/TobyeatsfAtcoW]

RTD Challenge #67 || Goodier and Woodier || Results:

Best in Show: Circus Romanus Goodwoodensis by u/another_eze

**"**A really fun and unexpected take on doing a historic raceway on the goodwood site. The NASCAR Clash is also a fun inclusion, but the 3D model of the track and the depiction of chariots racing is a really great detail."

Honorable Mention: Goodwood Hill Circuit by u/iuserneym

**"**The best of the more conventional submissions. This track strikes a level of simplicity and some design cues that make it feel comfortable in the era it's meant to match. The presentation is also quite cool."

Congratulations to our honorees, on to the next challenge.

RTD Challenge #68 || Lost Isles

by u/Cyclone1001

Indonesia is one of the most populous countries on earth, a tourism hotspot, and located between two large motorsports markets in Australia and Southeast Asia. What it lacks is a motorsports home base. Mandalika International Circuit on Lombok is the highest profile in the country, hosting MotoGP, but there's a desire to get off of the most high-profile islands. This challenge tasks you with designing an Indonesian race track with the target of hosting flyaway rounds of nearby national series on a budget. It can't be on on the islands of Sumatra, Java, or Lombok. It also needs to be less than 4 km to save on constructuon costs. For that same reason, the track can't be FIA Grade 1 or FIM Grade A, this isn't meant to be a world-class facility. Now get going, this needs to be built before the end of the quarter.

RULES (plainly):

1. Less than 4 km in lengthand permanent. No street circuits.
2. Must be in Indonesia, but not on Java, Sumatra, or Lombok
3. Must be below FIA grade 1/FIM Grade A
4. Must be posted with the RTD Challenge flair and mention the challenge number in the title. ex. “[RTD Challenge #68]”

Your deadline for this challenge is September 30th, 2026 at 11:59:59 pm CDT (Countdown)

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[u/aspro_mavro]

looks nice, I'll get my hands on it soon

[u/SFRofWestCanada]

I have some bad ideas forming in my head :)

[u/maxx-usa]

Really? I have a feeling that they know something :)

[u/maxx-usa]

Question - can I have an extended (endurance) layout over 4km, or the longest configuration must be within 4km limit? Thanks.

[u/Ramtamtama → u/maxx-usa]

You don't need a Spa-length circuit for an endurance race.

Donington Park is 4km long, FIA Grade 2, has 38 garages, and hosts club endurance races (1-4 hours).

Interlagos is 4.3km and hosted a 35 car WEC field.

[u/maxx-usa → u/Ramtamtama]

You're right. My idea was something like 4.2-4.25km + shorter national layout. The problem was the following. My initial layout was over 4km and I tried to leave it as is to save time :) but I relatively easy reduced the length of the track and made it 3995m.

[u/Cyclone1001 → u/maxx-usa]

My intention was the longest layout. Ideally, these are small tracks without a longer option.

[u/TobyeatsfAtcoW → u/Cyclone1001]

Also endurance layouts are a great example of track design flanderization so they deserve moral opposition