Consistently challenging climbing on a vertical face. Watch for loose, flaky rock just after the third bolt and towards the top. Still, this is a relatively clean route for the Hellgate. Don't forget to top out on this route, the view is fantastic.
Location
Head up the "Shooting Gallery" between Towers Two and Three. The Big Chill is the second bolt line from the left on Tower Two on the gold colored wall. The belay ledge is really a ramp.
Protection
8 Bolts to a 3 bolt anchor with slings (shared with Social Realism to the left).
So this is the route just left of Social Realism? And there's another to the left of it? I've never seen that one. If so its pretty hard for 10a. I'd give it at least a 10b. Good climb but a bit run to the anchors.
The Big Chill must be the route furthest to the left on Tower 2 (see comments for Social Realism). Whatever its true name, I agree that the route furthest to the left is 10b. Also, at least as of 8/5/07, there is a healthy run-out (at least 20 feet) to the chains. I think it would be somewhat traumatic for a leader just breaking into 5.10 sport climbing.