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Mountain bikers racing through the jarrah forest at Dwellingup
Dwellingup 100/Event rules

Event rules.

The C-Wise Dwellingup 100 is run under AusCycling and UCI rules. These are the event-specific rules — what you can ride, how the start works, and what happens at each cut-off.

Race rules C-Wise Dwellingup 100

What you can ride.

Sanctioning
The event is conducted under AusCycling and UCI rules. The rules below are in addition to those.
Mountain bikes only
A traditional, flat-bar mountain bike must be used.
No gravel bikes
Gravel bikes are not permitted in any Dwellingup 100 distance.
No drop bars
Drop bars are not permitted.
E-bikes
E-bikes are not permitted, except in the 40km Wallaby or the 20km Joey. E-bike riders must nominate as an e-bike rider during registration as e-bike riders are not eligable for prizes.
Licence
All riders must hold an AusCycling licence — an annual Race Off-Road or Race All Discipline membership, an eligible four-week free trial, or a day licence purchased during registration.
The start

Why 100 and 70 start together.

Mass start
The 70km Boxer and 100km Boomer start together at 8:15am. This mass start is a tried, tested and proven method of self-seeding, designed to avoid the danger of catching slower riders from different races or age groups once the course reaches singletrack.
Seed yourself honestly
The objective is to have 90% of the field in order before riders get into the singletrack in Murray Valley, so everyone gets a smooth, uninterrupted ride at their own pace through the 19km of singletrack there.
Passing
The fastest 100km riders may catch slower 40km and 70km riders in the last 10km of the course. Be patient, show courtesy and respect, and pass safely and wisely. Communicate, and say please and thank you.
Finishing after 5:00pm
Most 100km riders are expected to finish by 5:00pm — that is 8 hours 45 minutes, or an average of 11.3km/h. If you are slower than that, you may find the venue and signage being packed up. Your ride still counts: you will be given a finish time and a finisher’s medal.
Cut-offs and diversions

What happens if you are behind.

These are enforced by marshals & commissaires on the day

Times below are the moment the course closes at that point. If you arrive after the time listed, you will be diverted onto the shorter route or stopped — there is no discretion at the marshal point. The schedule page carries the same times in one table.

1:15pm · 100km Boomer
Oval Aid Station at the start–finish, 50km mark. That is 50km at 10km/h. Any 100km rider who wants to switch to the 70km can leave here between 1:15pm and 1:45pm, however may only do the last 19.2km, not the full 48km northern loop. Riders must inform race officials.
1:45pm · 70km Boxer
Oval Aid Station at the start–finish, 50km mark, at an average of 9km/h.
2:00pm · 100km Boomer
Freeman Road, Marrinup, 62.9km mark — 62.9km at 11km/h. Riders here after 2:00pm are turned left towards town on the same route the 70km riders take, rather than turning right onto Freeman Road. This cuts 29.6km and 471m of climbing.
11:30am · 40km Wallaby
Munda Biddi, World Away entrance, 29.5km mark. Any 40km rider here after 11:30am (10km/h or slower) is sent straight ahead, bypassing World Away and Lower Cloak and Dagger. This cuts 5.8km and 93m, for a total of 36.9km.
4:00pm · 100km Boomer
Munda Biddi, World Away entrance, 85.7km mark — 85.7km at 11km/h. Any 100km rider here after 4:00pm is sent straight ahead, bypassing World Away and Lower Cloak and Dagger. This cuts 5.8km and 93m, for a total of 92.9km.
5:00pm · Full event
Final cut-off at the finish line for every distance.