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greenBlue Fullerton Loop

  3.8 ( 93 ) Favorite

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11.2 mile 18.1 kilometer loop
70% Singletrack


Ascent: 669' 204 m
Descent: -679' -207 m
High: 473' 144 m
Low: 165' 50 m


Avg Grade: 2% (1°)
Max Grade: 11% (6°)


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Map Key

Popular and fun route "behind the scenes" around the City of Fullerton.

Darren Rector

E-Bikes Unknown

Features -none-

Family Friendly Juanita Cooke Trail and Laguna Lake are both very popular for kids and families.

No restrictions. Sections may be closed immediately after rainfall. Somewhere around 20 or so road crossings. Park at the Courthouse and head northward to go clockwise around the Loop.


A very easy 11+ mile loop right around downtown Fullerton with lots of variation. The loop flows clockwise and contains bridal trail and railroad-adjacent sections, true singletrack, a few steep and rutty climbs, lots of "extra credit", fast downhills, scenic vistas and even a shady lakeside section.

Need to Know

There are many junctions that are not marked specifically, so it helps to study the route via google earth before you hit it the first time. It is easy to miss some of the turns if you are unfamiliar with the route. Use the MTB Project mobile app to help follow the route. Elevation gain on this one is closer to 1015 feet rather than the listed 693 feet.


Park at the Courthouse and hit the Bridal Trail, then head north to Hiltscher Park Trail, across Euclid past Sunny Hills HS along the tracks. From there, it's a long steady climb through Grisson Park to Tree Park.

Hop back on Rosecrans Ave for about a mile, then turn eastward over many climbs and drops on Horse Trail, across Gilbert and back to Euclid via the Nora Kuttner Trail.

Pass Laguna Lake with a scenic respite, then back to the bridal trail southward to the train tracks. Go over the small dam on the Brea Dam Trail and down along the golf course, under Bastanchury Road, through the wilderness and over Brea Dam, down to Harbor Blvd. and back to the Courthouse. Simple as that.

History & Background

The Juanita Cook trail was originally the route of the Pacific Electric Railway "Red Car" line to Fullerton. The western portions surmount West Coyote Hills.


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May 18, 2019
Alfonso Guerrero
Apr 25, 2019
Duke Matt Norton
Apr 23, 2019
Duke Matt Norton
Apr 13, 2019
Tres Galvery
Apr 7, 2019
Mikey C
Apr 2, 2019
Drew Cerda
Mar 31, 2019
Jonathan Lyons
Mar 30, 2019
Sean Davidson

Trail Ratings

  3.8 from 93 votes


in Fullerton


  3.8 from 93 votes
5 Star
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in Fullerton


in California


733 Views Last Month
52,286 Since Jul 3, 2013
Easy/Intermediate Easy/Intermediate

Scott F  
To whoever turned the manhole after the bridge into a small jump: thank you. You put a smile on my face. Strava recorded results that differ from the listed information: 1,000 ft of elevation gain with a max grade of 14%. As someone getting into shape the climbs kicked my butt, but in a good way. Not a ride full of features, but definitely a workout (at least for some of us). Oct 22, 2018
Eddie Reyes
Eddie Reyes   EAST LA
Great trail for beginners, MTB drink/socialize club rides and training for the weekend. Other than that leave the DH helmet and compression suit at home unless your bones are made of glass or you're a complete DORK! I ride this twice a week and I've exhausted it's fun factor years ago but it keeps me pedaling fast and strong for the real rides on the weekend. There is one thing I can't stress enough about this route, it crosses many busy streets with many dumbass speedracer drivers so PLEASE TAKE EXTREME CAUTION WHEN CROSSING! There's a reason some nickname this ride the "FDL" Fullerton Death Loop... Apr 5, 2019
Russell A
Newport Beach
Russell A   Newport Beach
I rode the trail for the 1st time today and it was an absolute blast. Met some great people and had a ton of fun. I was following some locals so I knew where to go but if I tried it on my own I would have been lost. I suggest you find someone and just follow along, if they are too cool, just remember they are also on the same trail. Enjoy! May 13, 2019

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