Looks like an awesome place. But it's only accessible on special days with a guide. Irvine Company is saving it until they are allowed to develop it.
They had open access today. It is a beautiful place to hike, you can hike and horseback tide if that's you deal. I love this canyon area. Check "let's go outside" for other open access days. It was too hot for me today but I will go back.
Good views. Good place for trail running.
The place is gorgeous, and the view at the sincks spectacular.
Very nice canyon in Orange County: no need to go too far (but unreachable by public transportation).
Beautiful place but only open for special programs through the Irvine Ranch Conservancy and OC parks.
A great place for mountain biking. Lots of options for someone just getting started all the way up to the advanced rider. I don't recommend for small kids though.
Wonderful wildflowers in there spring!
Don't break down here at night
Nice place. Rather long hikes, every trail, all of them. Good views to be had. Would be nice if it wasn't RSVP.
It's a real shame that his park is only open on a certain day with limited time because I really wanted to get some pictures of the canyons during a sunrise or sunset. Limestone canyons are a bit overrated. It was really difficult to see and take pics due to the 20 person limit on a small lookout. The rangers strictly enforce this. Although the rangers are really helpful, I did get annoyed by their presence. I know they're just helping out, but it feels too much like they're policing the crowd around. The trail through Limestone Canyon road is really flat, lacks shade, boring and follows the road on the first half so you always hear traffic . Better using a mountain bike. Family friendly though. Most of the park is not covered in Limestone rock but was very green and there were lots of flowers. Hiked 11 miles from Augustine staging area through Sand Trap Trail, over Loma Ridge road and back down. I would recommend getting here early around 8AM and taking the Loma Ridge (or Sand Trap from Limestone canyon trail) up first as this offers better views and is a better fit for more athletic hikers. It's a giant 10 mile loop and only took me 3.5 hours. Really long but I highly recommend taking this route if you want a nice hard hike. Unfortunately, once you get up to Loma Ridge, you have a fabulous view of Irvine's landfill. This kind of ruined the excitement for me as I expected nice vistas.