MTB Project Logo

Fullerton Loop

 3.7 (82)

11.2 Miles 18.1 Kilometers



669' 204 m


-679' -207 m



Avg Grade (1°)


Max Grade (6°)

473' 144 m


165' 50 m



All Clear 1 day ago
Dry: Sever rutting from rain run-off in some sections. History

Getting forecast...

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

Darren Rector

Dogs Leashed

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.


You & This Featured Ride

Rate Quality

   Clear Rating

Rate Difficulty

Share This Ride

Your Check-Ins


Oct 22, 2018
Scott F
Bring a map. Brief +/- 15% grades. 12mi — 1h 56m
Oct 6, 2018
Gilbert Yu
Oct 6, 2018
Jordan Wyatt
Lots of steep climbs and descents, better to wait a couple days before riding after rain. Make sure to use the MTB Project app on your phone as a navi
Oct 5, 2018
Jake Yi
pretty boring technically, good exercise 11.9mi — 1h 30m
Sep 17, 2018
Kelvin Rockman
Sep 2, 2018
Lori Zacharoff
Sep 1, 2018
Vince Sanchez
Aug 26, 2018
Alan Corcoran
11.7mi — 1h 27m

Trail Ratings

  3.7 from 81 votes


in Fullerton


  3.7 from 81 votes
5 Star
4 Star
3 Star
2 Star
1 Star


in Fullerton


in California


1,173 Views Last Month
45,708 Since Jul 3, 2013
Easy/Intermediate Easy/Intermediate

No matter you skill level or conditioning, there is something about the loop that keeps you coming back. It's great interim cardio during the week to keep your wheels spinning and cardio up for the weekend warrior rides. Jul 14, 2018
Naro Chim
Signal Hill, CA
Naro Chim   Signal Hill, CA
For a beginner Mtn biker like myself this trail is perfect to practice on. The entire loop has a little bit of everything. I'm an avid runner and the hills still gave me a good workout. Sep 7, 2018
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). 14 hours ago

MTB Project is part of the REI Co-op family,
where a life outdoors is a life well lived.

Shop REI Mountain Bike

MTB Project is supported by

Support Your Local IMBA Chapter