I've often used this mountain as a quick workout as it's not far from where I live.
You can find all the details of the hike at http://www.birdandhike.com/Hike/Other_Areas/Lone_Mt/_Lone_Mt.htm
It's a steep 600 foot climb. Hiking poles would come in handy as there are some really steep spots where it's easy to slip on loose rocks.
The climb up is not too dangerous. Most slips will only result in scratches and bruises but watch your step at the summit. The top is very narrow a slip here could be disastrous.
Make sure you bring plenty of water. I'd avoid hiking this in the summer as there is absolutely no shade any where.