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Saturday, August 5

Marin County Fairgrounds
10 Avenue of Flags
San Rafael, CA

Register

Ride Information

Location

The ride starts and ends at the Marin County Fairgrounds.

What's Provided

Here's what comes with participation in the ride:

  • One of the West Coast's most scenic and best-supported rides
  • Fantastic rest stop food options and a hot post-ride feast at our celebratory expo
  • Route marked by color-coded arrows
  • SAG support and assistance from the Marin Amateur Radio Club
  • CHP-patrolled course and assisted lane closures for rider safety
  • Water-resistant color map and water bottle

Routes

Ride Event Miles # of Rest Stops Total Climbing (approx.) Experience
Half Metric 35.6 1 1,893 Novice/Recreational
Metric Century 62.5 3 3,947 Recreational/Experienced
Double Metric + 133.8 6 9,330 Experienced
Marin Century (Traditional) 104.6 4 6,381 Recreational/Experienced
Mt Tam Century 96.6 4 8,374 Experienced
Mt Tam Double Century 197.4 9 15,962 Experienced

With the exception of the Mt Tam Century, all routes are designed to allow riders to shorten their ride back to the finish.


Start Times

This year we have added a Gran Fondo-style mass start for all Double Metric+ and 100 Tam riders.  While participation in the mass start is optional, you must start those routes by 6:00 am. 100 Traditional and 100 Km riders are welcome to participate in the mass start as well. Riders who want to participate in the mass start should be at the mass start location on  Avenue of the Flags  by  5:45 am. We strongly advise that you purchase concierge mailing of your riders packet if you wish to be in the mass start. If you have not already done so please contact Crystal for information on how to add concierge mailing to your existing registration.

Those not participating in the mass start may start the route at any time before the mandatory times as listed in the chart below.   

 

Route

Start time

Mandatory Cut offs

Finish Time

Double Metric+

6:00 am

Coleman Loop - NOON

6:00 pm

100 Tam

6:00 am

7:30 am Nicasio Valley Rd @ Lucas Valley Rd

6:00 pm

100 Mi Traditional

7:00 am

 

6:00 pm

100 Km

7:00 am

 

6:00 pm

50 Km

8:00 am

 

6:00 pm

 

For information about the Mt. Tam Double Century please go HERE



Maps

Full color water resistant maps will be provided to all registered riders in their rider packets (for Concierge customers) or at the registration/packet pick up area on the morning of the ride.
 
To download and print a RWGPS map at home, use the link corresponding to the route you intend to ride:

Course Markings

Routes will be marked with (road) route arrows. However, the most reliable directions can be found on the reverse side of the map. The color of your route map and cue sheet will match the color of the course markings for your particular route. The tentative course colors (please check posted maps on ride day)are as follows:

Route Arrow Color
50 km Blue
100 km Yellow
200+ km Orange
Marin Century Green
Mt. Tam Century Purple
Mt. Tam Double Century Pink

Additionally, changes in direction will be marked with white signs at intersections. In 2011 & 2012 we found someone had removed a number of signs on the course. Signs are only an aid.

Lane Controls

For rider safety, CHP officers will be enforcing the following temporary lane, not road, closures to allow cyclists to pass:

  • 6:30-9 AM: Westbound lane on Lucas Valley Road from west of Westgate to Big Rock
  • 7:30 -10 AM: Northbound lane on Pt. Reyes-Petaluma Road from north of Nicasio Valley Road to the top of Rocky Hill

Safety

This is not a race. There is no winner.  Any rider seen to be operating their bike unsafely in any way, can and will be pulled from the ride and disqualified. Riders must have safe control of their bike at all times and must

  • Wear helmets at all times during the ride.
  • Be responsible for the safety and condition of their bicycle and cycling equipment.
  • Carry the following:
    • Driver's license or other form of ID
    • Medical release
    • Spare tube
    • Patch kit
    • Pump
    • Tire levers
    • Tools
    • Water bottles
    • Cell phone
    • Personal clothing
  • Sign the release form before starting the ride. Those under 18 years of age must have the form signed by a parent or guardian and must carry the medical release authorizing any needed treatment.
  • Be courteous to local drivers and respectful of traffic.
  • Obey all California vehicle code laws, including all stop signs and signals. Local authorities may cite violators.
  • Ride single file and stay right.
  • Announce “on your left” to all riders being passed.
  • Exercise extreme caution near all pace lines.
  • Safely stay as far right as possible or pull off the road if necessary to allow faster riders to pass.
  • Affix their rider number to their helmet and  bicycle and wear their wrist band for entry to the rest stops and the post-ride party.
  • Not attempt to have a private SAG vehicles. Riders with private sags will be disqualified.

Route Descriptions

50 KM HALF METRIC (33.2 miles)

Cyclists should be experienced and reasonably fit to attempt this ride.  Although not as long or difficult as the other courses, the 50K does have ONE SIGNIFICANT CLIMB ON LUCAS VALLEY ROAD, a climb made challenging by its narrow shoulder and steep grade.

It begins on flat-to-rolling terrain before a 1.5-mile, 430-foot climb to the Big Rock summit of Lucas Valley and a thrilling descent through the redwoods into the ranches and grasslands of West Marin. The route then winds north through relatively flat terrain past the small town of Nicasio. The rest stop is located at the Nicasio School (opposite side of the road).

The route continues alongside Nicasio Reservoir to the turnaround point at the junction of the Pt. Reyes–Petaluma Road at mile 16. Riders are welcome to stop again at the Nicasio School Rest Stop before beginning the climb back up Lucas Valley Road to Big Rock.

Riders should exercise caution on the DEMANDING DESCENT FROM BIG ROCK AT LUCAS VALLEY ROAD. This descent has several sharp left-hand turns with a decreasing radius. The remainder of the route is almost all downhill to the finish at the Marin County Fairgrounds.

100 KM METRIC CENTURY (60.2 miles)

THIS COURSE INCLUDES STEEP CLIMBS AND TECHNICAL DESCENTS.

It begins on flat-to-rolling terrain before a 1.5 mile, 430-foot climb to the Big Rock summit of Lucas Valley and a thrilling descent through the redwoods into the ranches and grasslands of West Marin. The route then winds north through relatively flat terrain past the small town of Nicasio--site of the first rest stop--and alongside Nicasio Reservoir.

A 1.4-mile, 380-foot climb up the Pt. Reyes-Petaluma Road and a gentle descent leads riders past the famous Cheese Factory and to the “Red Hill” climb, followed by a quick and curvy descent into the outskirts of Petaluma to the second rest stop at Petaluma High School (mile 29). Relatively flat terrain takes riders to the biggest challenge of the day-- Wilson Hill. This steep, 700-foot climb offers riders an exhilarating descent ending at a 90-degree left turn onto Hicks Valley Road. Rolling hills and sparsely traveled roads bring riders through ranch country and open space, where the route turns west on the Pt. Reyes-Petaluma Road, passing the Cheese Factory a second time. A slight climb and then a very fast descent to Nicasio Reservoir and Nicasio Valley Road ends in a relatively flat stretch to the third and final rest stop in the town of Nicasio.

A few miles later, riders  begin the climb back up Lucas Valley Road to Big Rock. Riders should exercise caution on the DEMANDING DESCENT FROM BIG ROCK AT LUCAS VALLEY ROAD. This descent has several sharp left-hand turns with a decreasing radius. The remainder of the route is almost all downhill to the finish at the Marin County Fairgrounds.

100 MI TRADITIONAL MARIN CENTURY (104.6 Miles)

THIS COURSE INCLUDES STEEP CLIMBS AND TECHNICAL DESCENTS.

It begins on flat-to-rolling terrain before a 1.5 mile, 430-foot climb to the Big Rock summit of Lucas Valley and a thrilling descent through the redwoods into the ranches and grasslands of West Marin. The route then winds north through relatively flat terrain past the small town of Nicasio--site of the first rest stop--and alongside Nicasio Reservoir.

A 1.4-mile, 380-foot climb up the Pt. Reyes-Petaluma Road and a gentle descent leads riders past the famous Cheese Factory and to the “Red Hill” climb, followed by a quick and curvy descent into the outskirts of Petaluma to the second rest stop at Petaluma  High School .  Riders continue on to the rolleurs of Chileno Valley Road to Tomales-Petaluma Road to Tomales. A left turn onto Dillon Beach Road leads to a moderate climb along Whitaker Bluff and remote Franklin School-Valley Ford Road, up and over one last ridge north, past the halfway point to the third rest stop at Valley Ford .

The ride continues over scenic and sparsely traveled roads to the short but steep Middle Road climb with another thrilling descent to the S curve at Whittaker Bluff. It then crosses over Highway 1 to become Fallon Two Rock Rd. which we follow to a right turn at Alexander Rd. and then a left back onto Tomales Petaluma Rd for the  trip back down  Chileno Valley Rd.   A rest stop awaits at the historic Laguna School before you climb back over the Wilson Hill to Hicks Valley Rd.    USE EXTREME CAUTION DESCENDING. THERE IS A SHARP LEFT TURN AT THE BOTTOM OF THE HILL.

The route continues along the rolling hills of Hicks Valley Road before turning west on Pt. Reyes-Petaluma Road, taking riders past the Cheese Factory to a slight climb and a very fast descent to Nicasio Reservoir and Nicasio Valley Road. A relatively flat stretch lead to the fifth and final rest stop in the town of Nicasio.

A few miles later, riders  begin the climb back up Lucas Valley Road to Big Rock. Riders should exercise caution on the DEMANDING DESCENT FROM BIG ROCK AT LUCAS VALLEY ROAD. This descent has several sharp left-hand turns with a decreasing radius. The remainder of the route is almost all downhill to the finish at the Marin County Fairgrounds.

MT TAM CENTURY (96.7Miles)

The Mt Tam Century  begins on flat-to-rolling terrain before a 1.4 mile, 430-foot climb to the Big Rock summit of Lucas Valley and a thrilling descent through the redwoods into the ranches and grasslands of West Marin. Here the route parts ways with the other courses, wending its south and east to the town of Fairfax and the ascent to the top of Mount Tamalpais (Tam), which begins on Bolinas-Fairfax Road. The narrow and twisting road levels out as it approaches a golf course and begins to climb again to the top of Pine Mountain, site of the first rest stop.

From the here the road descends in a series of tight left turns with a decreasing radius to four miles of rolleurs ending at a dam at Alpine Lake. A three-mile ascent takes riders to a left-hand turn onto Ridgecrest Road, which offers sweeping views of the Pacific Ocean and golden grass hillsides for the six miles of rolleurs, some with challenging grades, up to the top of Tam. At the very top is a checkpoint and the turnaround.

Riders now descend three miles that they just ascended and must take care to avoid riders finishing their climb to the top of Tam. They continue descending south to Pantoll with  a sharp right  onto Panoramic Highway—both roads have sharp technical turns that require extreme caution.

Here the course changes from previous years and we continue on Panoramic all the way to Hwy 1 .  

We turn north on Highway 1 just before the town of Stinson Beach,  just past town we reach our second rest stop at the Stinson Beach School as it passes the Bolinas Lagoon toward Olema and into   Pt. Reyes Station, where riders find their third rest stop.  The course continues north on Highway 1 to a right on Point Reyes-Petaluma Road, following the flat creek bed inland to Platform Bridge Rd where we make a right turn  and travel the  over to Sir Francis Drake  up and over the hill to Olema and back into Pt Reyes Station.  We head back along the same course to Platform bridge, this time around making a left on Petaluma Pt. Reyes Rd.  up  to the Nicasio Reservoir and right turn on Nicasio Valley Rd. A relatively flat stretch leads to the fifth and final rest stop at the Nicasio Schoolhouse.

A few miles later, riders  begin the climb back up Lucas Valley Road to Big Rock. Riders should exercise caution on the DEMANDING DESCENT FROM BIG ROCK AT LUCAS VALLEY ROAD. This descent has several sharp left-hand turns with a decreasing radius. The remainder of the route is almost all downhill to the finish at the Marin County Fairgrounds.

200 KM DOUBLE METRIC+ (133.8 miles)

THIS COURSE INCLUDES STEEP CLIMBS AND TECHNICAL DESCENTS.

The Marin Double Metric Century route joins the Marin Century route for the first 58 miles. The route begins on flat to rolling terrain before you are greeted with your first challenge of the day, a 1.5 mile and 430 foot climb to the Big Rock summit of Lucas Valley . This is followed by a thrilling descent through the redwoods into the ranches and grasslands of West Marin. The route then winds north through relatively flat terrain past the small town of Nicasio and alongside Nicasio Reservoir.

The 2nd climb of the day (1.4 miles and 380 foot gain) rolls up the Pt. Reyes-Petaluma Rd. over a summit and past the famous Cheese Factory.  You then continue to your 3rd climb up “Red Hill”, followed by a quick and curvy descent into the outskirts of Petaluma to the 2nd Rest Stop Petaluma High School at mile 29.2. Refueled, you will roll out to Chileno Valley Road . This road is one of the club favorites. The remote terrain is great for pace lines too. Ride on through relatively flat terrain (ok, it’s really more rollers…) and country roads as you cross highway 1 just north of Tomales.  A moderate climb along Whitaker Bluff leads you onto the remote Franklin School – Valley Ford Rd., up and over one last ridge north, past the halfway point for the day, to your 3rd Rest Stop at Valley Ford at mile 58. The Valley Ford Rest Stop is well stocked to sate your hunger and quench your thirst.

ALL DOUBLE METRIC RIDERS NEED TO SIGN IN AT THE BAY HILL COLEMAN LOOP CHECKPOINT AFTER LEAVING THE VALLEY FORD REST STOP. HARD CUTOFF TIME IS 12:00 for DM riders .    While the century riders are starting to head back south, you are about to taste some of the best hill climbs anywhere. The climb up Bay Hill Rd. is beautiful with grand vistas of the Pacific once you have earned the crest.  It is a quick descent (rough road) to Hwy 1 for some very scenic miles of coastline before turning onto Coleman Valley Rd. Coleman Valley Rd. is the big climb of the 220Km course. With 68 miles on your legs, the climb is long and steep with false summits and huge views. Be sure to look south from the top. At the edge of the horizon you will see Mt Tam! This is one for the books. Remember to smile! This will forever be one of your favorites!

At the top of the Coleman Valley Loop, mile 73.9, you will find a “Mini Rest Stop” stocked with water, Gatorade and energy supplements (gels, bars, etc). This stop will not have the usual array of fruit and other foods you may be used to but you will find those down the road a few more miles at Valley Ford.

The top of the Coleman Valley Loop undulates with a 400 ft descent in the middle before climbing right back up (gotta love that!). The final descent on remote Joy Rd  is very big and long, and the two lane road narrows in places, so watch for the occasional oncoming vehicle as you negotiate some fast curves. Wide shouldered roads take you back to your 4th Rest Stop in Valley Ford (Déjà vu) at mile 86.8.

The ride continues over scenic and sparsely traveled roads to the short but steep Middle Road climb with another thrilling descent to the S curve at Whittaker Bluff.  It then crosses over Highway 1 to become Fallon Two Rock Rd. which we follow to a right turn at Alexander Rd. and then a left back onto Tomales Petaluma Rd for the  trip back down  Chileno Valley Rd.   A rest stop awaits at the historic Laguna School (mile 106.9) before you climb back over the Wilson Hill to Hicks Valley Rd.    USE EXTREME CAUTION DESCENDING. THERE IS A SHARP LEFT TURN AT THE BOTTOM OF THE HILL.

The route continues along the rolling hills of Hicks Valley Road before turning west on Pt. Reyes-Petaluma Road, taking riders past the Cheese Factory to a slight climb and a very fast descent to Nicasio Reservoir and Nicasio Valley Road. A relatively flat stretch lead to the fifth and final rest stop at the Nicasio Schoolhouse (mile 119.4)

A few miles later, riders begin the climb back up Lucas Valley Road to Big Rock. Riders should exercise caution on the DEMANDING DESCENT FROM BIG ROCK AT LUCAS VALLEY ROAD. This descent has several sharp left-hand turns with a decreasing radius. The remainder of the route is almost all downhill to the finish at the Marin County Fairgrounds.

MT TAM DOUBLE CENTURY  All information and course description can be found HERE

Disclaimer

The Marin Cyclists Bike Club and the Marin Century ride director reserve the right to refuse entry, disqualify, or remove anyone from the course for reasons of the their own safety, for the safety of others, for violation of any rules above or of the California vehicle code or for any other reason including the well being of the rider, other riders, the ride, or the Marin Cyclist Club. The decision of the ride director is final.