Two Wheels, One County: A Rider's Guide to Cycling in Marin

Repack Road is still there. It's a fire road on the north side of Pine Mountain, west of Fairfax, and it drops 1,300 feet in under 2.1 miles. In October 1976 a group of locals started racing down it on modified 1930s Schwinn cruisers, and the coaster brakes got so hot on the way down that the grease burned off and had to be repacked at the bottom. That's the whole etymology. That's also, more or less, the origin of the mountain bike.

The Mountain Bike Hall of Fame counts 24 Repack races — 22 between 1976 and 1979, then two more in 1983 and 1984. The fastest run ever recorded belongs to Gary Fisher at 4:22. Joe Breeze went 4:24 and won ten races, more than anyone. Otis Guy, a firefighter, went 4:25. Wende Cragg's 5:27 was the fastest by a woman. Alan Bonds won the first race in 1976, notable mostly because he was the only rider who didn't crash.

Breeze tested the first purpose-built mountain bike, the Breezer 1, on Repack in 1977. Charlie Kelly and Gary Fisher started a company in Fairfax called MountainBikes. Mike Sinyard, who rode there, went on to found Specialized. In 1979 Kelly published a piece in Outside and the thing stopped being local.

I've lived here for years and I still find this slightly absurd: an entire global industry traces back to a rutted fire road twenty minutes from my house, and there's no plaque.

The museum is worth an hour

The Marin Museum of Bicycling and Mountain Bike Hall of Fame is at 1966 Sir Francis Drake Blvd in Fairfax. Thursday through Sunday, 11 to 5. Ten dollars for adults, five for students, free under six. The collection spans about 200 years of bicycles.

Book a docent tour in advance. Some of the docents are Hall of Fame inductees, which means you can occasionally get the Repack story from someone who was on the mountain for it.

The road riding, with actual numbers

Most write-ups of Marin riding are vague about distances, which is annoying when you're trying to plan a Saturday. Here are the real ones. Climb data is from PJAMM, which measures rather than estimates.

Paradise Loop — about 38 miles with roughly 1,600 feet of climbing, circling the Tiburon peninsula on Paradise Drive. Mostly rolling, near-constant Bay views, and the only real climb is Camino Alto at around 300 feet. This is the ride you take a visiting friend on.

A note, since our own earlier version of this article got it wrong: Paradise Loop is not a 17-mile ride. It's 38. If you've seen the shorter number somewhere, someone was measuring a fragment.

Hawk Hill via Conzelman Road — 1.8 miles, 515 feet, averaging 5.5%, steepest pitches around 8.6%. Strava's editorial team named it one of the most iconic segments in the world, with a median time around 19:30 across 6,500+ recorded rides. Short, repeatable, and the view back at the bridge is the one everybody photographs.

Mount Tam via Panoramic Highway North, from Stinson Beach — 6.6 miles, 2,397 feet, averaging 6.9%. PJAMM calls it the most challenging climb in Marin County. It tops out at West Peak, 2,563 feet.

Alpine Dam — the full loop is 40 miles and 3,405 feet. The Fairfax-Bolinas Road climb inside it is 2.5 miles at 6.8% average, kicking to 9.6%. Ride it counter-clockwise so you finish descending Panoramic rather than climbing it; that's the Marin County Bicycle Coalition's advice and it's correct.

Where you can actually ride dirt, which is less than you'd hope

Here's the thing nobody tells you before you move: Marin invented mountain biking and then largely closed its singletrack to mountain bikes.

The Mt. Tam watershed is fire roads only. Fifteen miles per hour, dropping to five when you pass hikers or horses, and rangers do enforce it — with radar and LIDAR guns, which has been covered nationally and is exactly as strange as it sounds.

Marin County Parks is stricter still: Class 1 e-bikes are allowed on paved multi-use paths but prohibited on all unpaved fire roads and trails in the Open Space District. GGNRA land — the Headlands, Tennessee Valley — is the most permissive, allowing all three e-bike classes on bike-legal trails, pedal-assist only.

That leaves two real singletrack systems in the county. China Camp State Park in San Rafael, three dollars a day, flowy and forgiving and the best call after rain because it drains fast. And Camp Tamarancho above Fairfax, on Boy Scout land, where the permit is five dollars a day, cash only, from Sunshine Bicycle Center at 737 Center Blvd. The Endor flow trail there is 1.5 miles of bermed, purpose-built singletrack and it's the reason people drive to Fairfax.

If singletrack is why you're moving, know that both of those are outside Southern Marin. From Tiburon or Mill Valley, they're a drive. We'd rather you hear that now than discover it in March.

The access fight is live and worth understanding. In September 2024 Marin Water approved a pilot opening 6.6 miles of watershed singletrack to bikes. On October 1st, the California Native Plant Society, Marin Audubon, and the Marin Conservation League sued. It settled in May 2025 with the district rescinding both pilots, and Singletracks covered the whole arc. What replaced it was an e-bike-only pilot, effective July 1, 2025, permitting e-bikes only where regular bikes already go. No new trail.

As of July 2026, Marin County Parks has a separate proposal out to allow Class 1 e-bikes on Open Space District fire roads. It was scheduled to return with findings in September. We haven't seen a decision published; if you're buying partly on trail access, check the current status rather than trusting this paragraph.

The shops are ridiculous for a county this size

Five towns, five good shops, none of them phoning it in.

Tam Bikes, 357 Miller Ave, Mill Valley — Specialized, Santa Cruz, Yeti, Pivot, Transition, and the closest real service counter to the Tam trailheads. Mike's Bikes, 1 Gate 6 Rd, Sausalito, sits right at the north end of the Mill Valley–Sausalito path. Sunshine Bicycle Center, 737 Center Blvd, Fairfax — a genuine institution, and the place you buy your Tamarancho permit. Village Peddler, 1111 Magnolia Ave, Larkspur, has been serving Marin since 1973. Trek at 13 San Clemente Dr covers Corte Madera.

That's a lot of bike shop for 250,000 people, and it's downstream of the obvious: this is where the sport was invented and the riding never stopped being good.

And then there's Above Category

Declaring the conflict up front: I'm a customer.

Above Category is at 42½ Caledonia Street in Sausalito, and it is not a bike shop in the sense the previous paragraph used the word. It's one of the best custom bike dealers in the world — Mosaic, Pegoretti, Sarto, Bastion, Baum, No. 22 — and I'm not the one saying so. No. 22 Bicycles, a builder, called co-founder Chad Nordwall "founder of one of the preeminent bike shops in the world." BikeBiz called the room "part custom bike studio and part art gallery." In 2024 they closed off a block of Caledonia for their own invitational show and builders flew in from four continents.

Chad started it because he walked into a shop, considered buying a bike, and nobody spoke to him. His fix, in his words: "We use all this stuff on a daily basis, and if we try something and don't like it, we don't carry it."

I'm having a Pegoretti Elio built there — Columbus XCR stainless, hand-finished in Verona. I went in ready to talk groupsets and spent most of the first conversation answering questions about which rides I actually do on a Tuesday evening versus the ones I tell people I do. That's the difference.

One last thing, because it closes a loop I can't resist. Dario Pegoretti, who died in 2018, welded frames that went out under other marques for Indurain and Pantani before his own name was on anything. One of his customers was Robin Williams — serious cyclist, serious collector, and a Tiburon resident, four miles across the water from the shop, on the peninsula the Paradise Loop circles.

An Italian master's steel, sold on a side street in Sausalito, ridden by a comedian in Tiburon, twenty minutes from the fire road where mountain biking was invented. Marin is a small place that keeps turning out to be the center of things.

What this has to do with houses

Cycling sorts Marin neighborhoods more than people expect, and it does it on weekday rides, not weekend ones. Anyone will drive twenty minutes for the big Saturday loop. Nobody drives twenty minutes for the ninety-minute spin after work — and that's the ride you'll do two hundred times a year.

From most of Mill Valley you're on the lower flanks of Tam inside ten minutes, which is why the town skews road-heavy. Sausalito trades the climb for the Headlands: out Alexander, up Conzelman, back through Fort Baker. Flatter, windier, and you're negotiating bridge-path tourist traffic on weekends, which locals solve by going at 6:30am.

The dirt argument points out of Southern Marin entirely — China Camp is over the hill in San Rafael, Tamarancho is above Fairfax. Worth knowing before you buy a house in Tiburon on the strength of Marin's mountain-biking reputation.

And the path network is the one that changes when there are kids. The Cal Park Hill tunnel connects Larkspur to south San Rafael off-road, which is why those towns come up when a family asks whether a twelve-year-old can get somewhere alone on a bike. In our experience that question moves more purchases than Mount Tam does.

If you're moving here and you ride, the thing to do is obvious and almost nobody does it: ride from the house you're considering, on a weekday, at the hour you'd actually go. Twice. The county rewards it.