I should have read the comments first, as I was very confused by the lack of a gate after the turn off of (and onto?) Main Divide. Never saw a gate after turning off the paved road, and ended up at the saddle, which by the way was totally unmarked. Look for a big open area with several metal off-road fences surrounding it if you want to go to the saddle. Frankly, parking down below and hiking up would have made for a much longer, much more difficult hike, but wouldn't be all that pleasant, as it is totally exposed and basically just up a road you could just as easily drive. The last 1.1 miles (each way) from the saddle was a great hike, though considerably shorter than we intended. Trail was narrow, with lots of loose rocks, and had several (relatively short) steep sections, so be sure you have proper footwear.
If you have sure-footed kids, it is a good one for them, as it isn't really too long or too hard and has a great view from the peak--or at least it should be. We couldn't see anything on the OC side because of low clouds.
Look for snakes! At the peak, while relaxing next to the surveyor's mark and the peak log, a large rattlesnake crawled right up behind my wife and went right under the rock she was sitting on! Lots of big boulders strewn around the peak, so be sure to watch yourself, your kids, and your dog closely while you are up there!