Charleston Peak offers ice climbing in the WI2 to WI5+ range. Areas include: Lost Falls (WI 2), Echo Falls (WI 3), Vegas Hose Monster (WI 5+), Little Falls (WI 2+), Avalanche Falls (WI 4), and Mary Jane Falls (WI 4). For more information see NevadaClimbing.com's Ice Climbing Areas page.
The sign at the top of the switchbacks that points to the peaks of Mt. Charleston and Griffith peak also has a "Trailhead" arrow that points towards Griffith Peak, rather than towards the switchbacks that lead down to the actual trailhead. If you're tired, dehydrated and/or new there, it may result in some confusion as you head down.
I recently noticed that an overnight camping permit is now required to spend the night anywhere in the Spring mountains. The sign posted at the South Loop trailhead does not say where you can obtain the permit. There is a $100 fine for camping without permit.
Charleston Peak is also one of the sought after prominence peaks in Nevada as it ranks #1 on the list. It has 8241 feet of prominence which makes it very special to those who seek the prominence peaks. This prominence puts it in an elite group of peaks in the USA that have a prominence of over 5000 feet and those can be seen on this neat MAP HERE. If you don't understand what prominence is all about, here is a good explanation. Adam Helman recently authored a book completely dedicated to prominence.
Beware that the US Forest Service has contracted out parking for the South Loop Trail. And, they close the gates to the parking area at 8:00 PM. I found out the hard way about this.