That's about right, I didn't see any powerhouse though. I rode south along the west side of Lowry Lake towards a scout camp, and then headed west at a 4-way towards the climb. As far as I could tell, I couldn't get much farther west of this.
I've got a vid of the climb, I'll have to post it sometime.
That would be interesting to explore the other side of the lake, might take a while to find a trail head, eh?