This chossy boulder is located next to the road in a big pull-off at mile marker 263. There are two problems on the river side of the boulder that both have sketchy topouts.
Getting There
Park in the big pull-off area at mile marker 263. The boulder is right next to the parking area. This pulloff is just across and slightly downstream from the High Profile Wall.
The Classics
Mountain Project's determination of some of the classic, most popular, highest rated routes for Jerky Boulder (263):
This route starts in the small cave on the right side of the boulder on a left-sloping crimp and a right undercling. Go left to another sloping crimp, heelhook and go right to a crimper/gaston. Several desperate sequences can be done to gain a jug and then a scary, but decent and easy topout up right....[more]Browse More Classics in CO
I've seen it in another online guide listed as The Vanilla Ice Boulder. There is a V5 on the left of it (ice ice baby) and a V6 on the right (word to your mother).
It just seemed that the photo from FRB wasn't anything like a double arete and if you look at where the numbers are posted in seems as if they are on the creek side, while the double arete is more on the terrestial side of the boulder.
I recall seeing a boulder with chalked up double aretes across the creek from the road with the aretes on the right side of the boulder, but that was further downstream....
Are you talking about the double arete that has a built up landing? If so, that boulder problem is called The Fridge (V6 or so). It was done first just a few months ago. I can't remember the guy's, who did the FA, name. I did the second.