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Upper O'Neill Trail is a 1.9 mile heavily trafficked out and back trail located near Rancho Santa Margarita, California that features beautiful wild flowers and is good for all skill levels. 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.

Length 1.9 mi Elevation gain 121 ft Route type Out & Back

Dogs on leash

Wheelchair friendly

Kid friendly

Stroller friendly

Camping

Hiking

Horseback riding

Mountain biking

Nature trips

Walking

Bird watching

Running

Forest

Views

Wild flowers

Wildlife

Waypoints (0)
Weather
UV Index
Daylight
Reviews (142)
Photos (67)
Recordings (176)
Completed (264)
Katarina Dawn
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HikingGreat!

Flat trail and super easy, partially shady, dog and kid friendly. Bathrooms are closed but there are water fountains along the trail.

David Harlow
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Walking

Absolutely easy, not moderate. Very pretty walk in the forest, with beautiful views. Family friendly.

Carlos Martinez
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HikingNo shade
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Amy Huffman
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HikingBugs
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Scott Shanklin
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Hiking

I’d say more easy than moderate but it’s a beautiful little walk, you forget that you’re only a short distance from suburbia. Some water flowing, great March weather, lots of people out and about and incredible views of Santiago Peak and the surrounding mountains to the east.

Kevin Smith
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Hiking

Some of the hike was on trails some was on O’Neil regional park blacktop. Easy to moderate. Christina and I walked with our 10 pound Maltese terrier Macy. A lot of fun. By the time we ended we were sweaty.

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Brandi Rubin
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Hiking

Street parking. Free. Lots of it. Short and sweet paved trail through park. Not much to see, not very interesting. Good walk dog area. Done twice only because it's the only place my two dogs are easy to walk.

Zsazsa Johnson
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Hiking

Pretty cool. Drops into campground too

George Thai
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Hiking

Good hike with friends and the dog.

View George's Recording
Juan Galvez
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Hiking

Nice easy trail. At the south end you can get on another short one called Twisty Tire which has some really nice scenery. There is some poison oak though, so just watch out for that

Christopher Dalton
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HikingBugsMuddyOff trailRockyScramble

Fun and scenic hikes with really cool trails!

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Tarah M.
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Lots of parking, but gates don't open till 7 so don't go too early... Not hard at all-we went further and was very enjoyable!

Brandi Rubin
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray StarGray StarGray StarJanuary 20, 2018
Hiking

Pretty trail. You can hear a bit of traffic from toll road. Peaceful yet. Dirt and concrete trail through campground. Overlooks dry creek bed. Mostly shaded which was nice. Easy Trail. Pups loved it

Jordan O'Neal
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Camping

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!

Chad Deitrick
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Mountain biking

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.

Dori Gillies
Yellow StarYellow StarYellow StarYellow StarGray StarGray StarGray StarGray StarGray StarGray StarJuly 1, 2012
Hiking
First to Review

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

Guangcai Z.
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Hiking
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Jacek Galus
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Hiking
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Christelle Raynaud
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Hiking
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Daniel Reyes Alarcon
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Hiking
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Zack Adams
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Hiking
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Mary Hiller
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Hiking
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John Hall
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Hiking
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AllTrails User
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Hiking
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Flora Macias
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Hiking
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Flora Macias
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Hiking
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Showing results 1 - 26 of 142