Bit the bullet and did the drive over the pass(and then some) to ride some dry trails.  We essentially rode the downloadable GPS track - got off the mark here and there but not a problem.  Trails are dry and fun with some nice rocky techy stuff here and there.  A few off your bike climbs and descents but nothing more than 50-100 feet at a time.

As we descended back into the Ancient lakes Coulee we went left at the fork-next time I wll go right.  Going left was muddy and ended at a very steep scree field we had to get down(100 ft) - not too dangerous but just not too fun either. GPS track goes right at the fork.

Spring is a good time for this trail.