Here's a ride I've been eyeballing a while, uncertain as to the condition of the road and level of difficulty. The map at least showed it's a legitimate bike trail, however without going one would know the size and lose-ness of the rocks in the trail bed up from the Mountain Research Station.
The trail starts at 9500' MSL. Here's looking south toward Eldora ski resort and Silver lake down in front.
Looking south-east to Boulder reservoir and the Flatiron range.
Around 11,500' MSL just another 700' climb to go.
Just peaking over Niwot Mountain.
And finally the top at 12,250'. Time to go check out the hard earned views. Perfect temperature, no wind or storms.
Isabelle Glacier at the southwest end of Brainard Lakes, under Shoshoni and Apache Peaks.
The trail passing Isabelle lake.
All downhill on the way back...