MTB Project Logo

Trione-Annadel State Park - Big Loop

 42 votes


16.6 Miles 26.8 Kilometers




1,945' 593 m


-1,958' -597 m



Avg Grade (3°)


Max Grade (11°)

1,438' 438 m


333' 102 m



Minor Issues 3 days ago

Getting forecast...

A good mix of technical singletrack and fire roads make for a fun 15-mile route.

Philip McAllister


The big loop around the state park - featuring highly technical singletrack up the Cobblestone trail, and a blast heading down the swooping North and South Burma Trail. There are opportunities to get some air and breeze around the swooping corners.

There are plenty of options to take side loops or shorten up the ride as necessary.

Be careful fording the stream near Ledson March - the water can get quite deep depending on when you are there. Protect that iPhone!
Features: -none-
Dogs: No Dogs

Need to Know

Be prepared to get off and push heading up Cobblestone Trail - it's at least a black diamond - possibly double black.


From the parking lot, head up Cobblestone Trail. It's hard going on the uphill. Brutal in fact. Expect to get off and push unless you're top notch at navigating rock (or small boulder) gardens.

From the top of Cobblestone, link up with Rough Trail and follow that through the rocky meadows with the stunted trees down to Lake Illsanjo. The trail should widen up to fire road / semi-paved trail.

Head up the hill through a couple of rough spots and then take the branch to the right, heading up Canyon Trail before heading down Marsh trail to the left. You should be in the shade of trees for most of Marsh trail. Eventually ridge trail will veer off to the right and you can follow that for a little over three miles before meeting up with the fire road on the South side of Ledson Marsh. Head right and you can take a short 1.3 mile loop around Ridge Trail/ Pig Flat Trail - nothing special really though.

Once you meet back up with Ridge Trail by the picnic tables at Ledson marsh, head right and continue to follow the fire road around the marsh to the restrooms (ford the stream just before the restrooms). Be careful here - the stream can be deep.

From the restrooms, follow the singletrack up to the left. You'll be back in the sun now. There are great views overlooking the marsh to the left too. Once you hit the T, follow South Burma Trail to the right and enjoy the swooping downhills beneath the trees again. This is the highlight of the ride for me.

At some point you'll hit fire road - head right and keep going until you meet up with North Burma Trail. Belt down North Burma - there are some technical bits on the downhill, and a couple of rock gardens. If it's later in the day, watch out for hikers too... You'll meet up with Channel trail - head left and and follow the road back, eventually dropping onto the road and following that to the parking lot.


Land Manager: California State Parks

You & this Featured Ride

Rate Quality

   Clear Rating

Rate Difficulty

Get On-Trail Navigation

Send to Phone
Your Check-Ins


May 5, 2018
Mule Phobia
Ridge Trail and Marsh Trail (between Lawndale and Pig Flat trail) are both closed 17.5mi — 2h 30m
Apr 28, 2018
Joline Fan
Prewedding bike ride! 12mi
Apr 26, 2018
Mar Cos
That was pretty cool 16.6mi
Apr 21, 2018
Apr 3, 2018
Joey Ramirez
Dec 10, 2017
Simon Hobbs
Dec 10, 2017
Erik Reindl
Oct 26, 2017
Christopher Stanley
Park closed until further notice due to fire damage and assessment needs. Trione Annadel website: . (volunteer application)

Trail Ratings

  4.3 from 42 votes


  4.3 from 42 votes
5 Star
4 Star
3 Star
2 Star
1 Star


in California


1,094 Views Last Month
32,243 Since Apr 3, 2013
Intermediate/Difficult Intermediate/Difficult

Annadel is a MTB play ground. With all of the rock gardens it's pedal strike galore. Some of the local riders I met on the trail suggested this route the opposite direction. Riding up North Burma is easier than up Cobblestone, and Marsh, but then you'd miss flowing down N Burma, and that was a lot of fun. There's no water anywhere so if you're going in a warm month pack plenty. May 18, 2017
Ridge Trail and Marsh Trail (between Lawndale and Pig Flat trail) are both closed as of 2018-05-05 May 7, 2018
The connection between Lawndale and Schultz Trails is now open (as of 5/6)--solid new wood bridge just completed. Good job Annadel and volunteers! Not sure about Ridge but saw no prohibitive signs up high. April 20 official notice posted at lower elevations is out of date. So, ride on... May 10, 2018

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