I don't have the e-mail address for the director of the race, but I did
get a response. The bike course is kind of described in it. Here it is:
Packet pick-up is at Peoria City Hall, 8401 W. Monroe from 9:30 to 5:00
on May 31. Because you will be given a free pass into the park and
because of traffic problems at the race site, it is not possible to pick
up your packet on race morning.
There is no bike check in.
The race starts at the north boat ramp (just before Castle Hot Springs
Road turns to dirt. The bike course goes south on Castle Hot Springs to
Highway 74, then west 2.2 miles. The bike returns the same way except
to detour to the park operations center. The run 3.1 miles north on
Castle Hot Springs Road and return.