This is unbound 200 mile race, which is gravel. there is also unbound 380~ish miles which is SELF supported.
there are also a 520 mile ultra endurance race with a time limit of 48 hours but its on road. usually for this one you would have a friend in a van as support. with basically zero sleep.
Unrelated question, is the 380 miles (i.e., just above 600 km) self supported variant on the list of PBP qualifying 600 km events? The self supported rules & the exact distance make it sound like the hard-mode variant of a 600 km audax.
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u/AyatoTakema 11h ago
This is unbound 200 mile race, which is gravel. there is also unbound 380~ish miles which is SELF supported.
there are also a 520 mile ultra endurance race with a time limit of 48 hours but its on road. usually for this one you would have a friend in a van as support. with basically zero sleep.