Your Shopping Cart

So far it’s a solo ride.

The Dirt East Peak TT: Details From the Course

Derek Yarra |

If you're a local rider to Marin and spend any time riding dirt, chances are you're well acquainted with the course for our upcoming Dirt East Peak TT. But for those less familiar, we wanted to share some intel and insight on the tracks that lie ahead.

Starting down in the base of the valley just outside of Muir Woods, the ~7 mile course ascends to the summit of East Peak, truly puts the varied terrain of Mt. Tamalpais on display. Dive in as we break down the two stages to show you what's in store.

OSBR Hill Climb Dirt East Peak TT

Stage One: Deer Park Fire Road

Distance - 3.02 miles | Elevation Gain - 1,400 ft | Average Grade - 8.5%


stage one profile

The party gets started at the gate to Deer Park fire road. Wasting no time at all, you're greeted with a steep, zig zagging pitch into the woods. Surrounded by twisty madrone and oak trees, you'll push up the steep risers, often hitting slopes over 15%. While the dirt is generally hard packed, it's often a bit off camber and can easily range from loose and dusty to a slick slip and slide depending on recent precipitations. Oh and there are litterings of baseball sized rocks periodically spanning the trail for water run off management. Surely no problem should you decide to roll up 28c slicks, right?

Deer Park Fire road beginning

About a half mile up, you'll round a corner and the incline will level off for a little bit. The trail continues from open clearings to tunnels of forrest, transitioning back and forth from hard dirt to loam. While crossing some of the clearings, you'll encounter more rock droppings to manage water damage. Depending on your tire choice, you'll really want to select your line wisely. If you find yourself in need of a distraction from the pain cave, a quick look over your left shoulder will treat you to views out to the coast line.

Deer Park part two

Halfway up the stage, you'll leave an exposed clearing and become immersed in lush greens and towering Douglas firs. The dirt gets soft and loamy, with plenty surprise roots to look out for. The trail transitions to rolling for a bit, giving some brief moments to recover and let things rip before the final steep incline out of the forest.

deer park forest loam

The trail opens up and connects with Coast View Trail. Don't stop there though, a final stretch on a paved path will bring you to the finish at the Pantoll station. Sprint across the bots dots and you can enjoy a moment to catch your breath. Remember, you've only got five minutes to cross the street and begin stage two.

deer park finish line

Stage Two: Pantoll to East Peak

Distance - 3.57 miles | Elevation Gain - 843 ft | Average Grade - 4.4%

stage 2 profile

After a sip of water and slamming a gel, ride across the Great Highway and get yourself ready to throw down once again. While Stage two starts on a similar paved path to how Stage One ends, this segment is an entirely different beast.

old stage pavement

The path leads out to Stagecoach Fire Road, also know as the Old Stage Road. While it's largely a rolling traverse, don't be fooled into thinking it'll be easy. As soon as the path turns to dirt, things start getting rough and rocky. 

old stage into the dirt

Deep ruts, creek crossing, and chunky serpentine rock are all abundant and will challenge your ability to hold a steady cadence. They might challenge your tire's sidewall integrity too.

old stage 3

About a 1 3/4 miles into the stage, things start to shift from rocks back to dirt. The incline gradually picks up until you find yourself at at West Point in. While we're all used to stopping here to eat a snack and soak in the views, you're gonna want to resist the urge, take a hard left, and keep pushing through.

west point inn to Rail Road grade

Now you're on the famed Old Rail Road Grade. For the next mile and a half you'll lock into a steady 6% grade. Relieved of the chunky serpentine rock of Stagecoach, you can settle in and focus on hammering it out to the top.

rail road grade to east peak

When you see you're about to enter the trees and the lookout tower is in sight, you know you're in the final stretch. Hopefully you've left something in the tank because the final sprint up the 10% pitch doesn't show sympathy for anyone.

pavement to east peak lot

Phew. You made it. Hopefully you stashed a cold one at the top you can enjoy the views and revel in finally reaching the summit. Now that the hard parts over, how you shred back down the mountain is entirely up to you!

views from the top of east peak

Now that you know the lay of the land, are you ready to put in your best effort and race to the top? The title and winners jersey is on the line!

To learn more and enter the challenge, go here

OSBR Gravel Hill Climb Edition

Start your Build Since 2006, we've been creating the world's finest dream bikes with our signature approach to custom builds and customer service. Our Custom Program
AC Everywhere You can find us just over Golden Gate Bridge in California's Marin County. Can’t come to us? We can bring the bike to you. We craft custom bikes for clients all across the U.S. and the world. Contact us