If you like crimps, then this is the boulder for you. Stand start with your fingers in the horizontal seam.  Throw big to a crimp.  Bump again to another crimp (depending on your height) and then slap out to the arete to top out.  

Approach 1: If you entered into Tier 1 directly from the kiosk area, continue along the cliff band until you pass the lichen slab problem.  Continue walking up and left along a line of large boulders to your left.  This Triangular boulder is located up the hill around 150-200 paces depending on your height.

Approach 2: Option 2 is to stay hiking on the boulder loop trail.  Take the left at the junction and walk uphill on the trail.  The Triangular boulder is located to your left and is visible from the trail.