Upper O'Neill Trail

MODERATE 5 reviews
#1 of 1 trails in

Upper O'Neill Trail is a 2.7 mile heavily trafficked loop trail located near Rancho Santa Margarita, CA that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

2.7 miles 223 feet Loop

dogs on leash

wheelchair friendly

kid friendly




mountain biking

nature trips

trail running


horseback riding



wild flowers


4 months ago

11 months ago

We love to camp and hike here. This is a great park. It's dog and horse friendly, which I used to take advantage of when I had a dog. The park frequently hosts events that are educational and for all ages. The most recent event we attended was Acorn Day. My daughters (2 and 3 years old) loved it. Lots of crafts, music, food trucks, booths with animals. Very fun.

The only reason O'Neill doesn't get 5 stars is that it's located right next to the 241 toll road. It is such a buzzkill to be hiking down a trail and hearing cars rush by or find a smashed TV under the bridge. Other than that, it's great!

1 year ago

mountain biking
1 year ago

My friend and I went mountain biking on the trail here. It was a lot of fun. Several streams and small changes in elevation kept things interesting but, not really technical. A portion of the trail is 100% exposed for about an hour or so bring a hat or sunscreen.

4 years ago

Completed a portion if the arroyo trabuco trail, passing under the 241. Foliage dry, stream dry, will probably be much better in sptingtime.