The Regency is a large crag and certainly has climbing other than the documented line on El Camino Royale. The crag is large enough, in fact, that other scrambling opportunities offer climbing with no overlapping area and none close to it, as well as of a significantly different vantage point and rock character. One such line is the NE Ridge.
From the base, head up and North along to the last of the various aspects and buttresses and climb that up over 3 overlapping slabs from bottom to top. The rock is mostly very good and clean. It is a 3-star line if climbed through the best and most continuous features.
To borrow from Nick's comment below, perhaps for greater clarity since a few people have reported poor conditions on their scramble: "the key to keeping the climbing fun and clean on this route is to maintain your position just a little ways down and climber's left of the crest of the NE Rib. Staying true to the ridge proper gets you into some stupid not fun terrain that is harder than 5.0. Keeping to the cleaned, mostly lichen free rock about 100' or so below the ridge crest will keep the smiles coming :) "
Red Rock, AZ
Around Boulder, CO
There are some sub-formations recessed a bit down that I was on, as mentioned. Keep looking! Jun 29, 2018
Arvada
Approach: after making the turn off Mesa Trail and getting onto the old mining road heading to Regency, to your right/north, find 2 boulderfields separated by a strip of grass (the first is wider, the second boulderfield is skinnier). Immediately after passing the second, skinny boulderfield, look right/north to find an excellent climber's trail leading toward the NE Rib. Do NOT follow all the way to the highest point of the trail. Rather, about 2/3 of the way up the hillside, look for a clean toe of rock reaching the ground that extends further down than the surrounding rock. Leave the now dim climber's trail to traverse over to this toe. It is about half to 3/4 of the way up from the lowest point of Regency. There are downed trees that will scratch you as you mount the bottom part of the slab.
The key to keeping the climbing fun and clean on this route is to maintain your position just a little ways down and climber's left of the crest of the NE Rib. Staying true to the ridge proper gets you into some stupid, not fun terrain that is harder than 5.0. Keeping to the cleaned, mostly lichen free rock about 100' or so below the ridge crest will keep the smiles coming :) Apr 8, 2022