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ROUTE DESCRIPTIONS



50 KM HALF METRIC

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. 


100 KM HALF CENTURY

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 to a left turn on Hicks Valley Rd.  as we head to Marshall Petaluma Rd our second rest stop at Walker Creek Ranch.  Fill up your water bottles before the famous climb up the back side of the Marshall Wall, it starts out steep and and has two false summits before the thrilling descent to Highway One .  Use caution here as you navigate the left turn onto the highway to enjoy the rolleurs all the way the  Pt. Reyes Station.   Just 10 miles later and you're at the Nicasio Rest Stop again.

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. 


100 MI MARIN CENTURY CLASSIC


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 Cheese Factory to a left turn on Hicks Valley Rd. Fuel up at the Lincoln School Rest Stop before  heading north to Marshal Petaluma Rd/Wilson Hill junction.  A left turn here takes you through bucolic farm lands to Highway 1 where you head North 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 sparsly travelled 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 Road which we follow to a right turn at Alexander Road and then a left onto Tomales Petaluma Road and back to Chileno Valley Rd for the return.   A rest stop awaits at the historic Laguna School before you continue to the outskirts of Petaluma and the left turn on Windsor Rd through the roundabout to D Street. Head 
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. 

MT TAM CENTURY


THIS COURSE INCLUDES STEEP CLIMBS AND TECHNICAL DESCENTS.

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 Pine Mountain, the road descends in a series of tight turns with a decreasing radius to four miles of rollers ending at a dam at Alpine Lake. A three-mile ascent takes riders to the ridge where we continue over the top to and a winding descent down to Highway 1 at the Bolinas Junction.  We turn left to travel South on Highway 1 past the Bolinas Lagoon and through Stinson Beach to a left turn at Panoramic.  The open switchbacks allow beautiful views of the Pacific all the way to the top where it enters the forest and then begins to a sweeping descent  back with a few rollers to Highway 1 North. The turn here is a very sharp right.  Use caution as car traffic has the right of way an can approach at high speeds.  Highway descends to Muir Beach and  our second Rest stop at the Golden Gate Stables.

We then continue North again passing the Bolinas Lagoon to the hamlet of Olema where we make a right onto Sir Francis Drake for the climb up and over to Platform Bridge Rd.  It's a sharp left at the bottom of the hill to the Water Stop before we continue  traveling inland to 
the Nicasio Reservoir and right turn on Nicasio Valley Rd. A relatively flat stretch leads to the 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.



200 KM DOUBLE METRIC


THIS COURSE INCLUDES STEEP CLIMBS AND TECHNICAL DESCENTS.

Tbegins 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 Pine Mountain, the road descends in a series of tight turns with a decreasing radius to four miles of rollers ending at a dam at Alpine Lake. A three-mile ascent takes riders to the ridge where we continue over the top to and a winding descent down to Highway 1 at the Bolinas Junction.  We turn left to travel South on Highway 1 past the Bolinas Lagoon and through Stinson Beach to a left turn at Panoramic.  The open switchbacks allow beautiful views of the Pacific all the way to the top where it enters the forest and then begins to a sweeping descent  back with a few rollers to Highway 1 North. The turn here is a very sharp right.  Use caution as car traffic has the right of way an can approach at high speeds.  Highway descends to Muir Beach and  our second Rest stop at the Golden Gate Stables.

We then continue North again passing the Bolinas Lagoon to the hamlet of Olema where we make a right onto Sir Francis Drake for the climb up and over to Platform Bridge Rd.  It's a sharp left at the bottom of the hill to the Water Stop before we continue  traveling inland passing  
the 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 Cheese Factory to a left turn on Hicks Valley Rd.  A few miles down the road we turn right to climb the Wilson Hill and  onto Chileno Valley Rd.  The rest stop is about a mile after the turn then you reverse back and make a left to head into Petaluma. Turn right on Windsor Rd which leads to D St where you make a right and  follow the road back to the reservoir to the left turn on Nicasio and the home stretch. A relatively flat stretch lead to the 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.


gravel Grinder

THIS COURSE INCLUDES STEEP CLIMBS AND TECHNICAL DESCENTS.   NOT RECOMMENDED FOR NOVICE RIDERS. 

The Grinder follows the Mt Tam Century Course to the top of Big Rock and then splits to the first section of dirt at Loma Alta  Fire Road.  6 miles of dirt over the ridge and down to Fairfax.  Some technical sections  and no services available so be sure to carry enough water and be sure your bike is in good order.  We pop off the gravel at White Hill School and then make a left onto Sir Francis Drake where we rejoin the Mt. Tam route.  and the ascent to Ridgecrest, 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 Pine Mountain, the road descends in a series of tight turns with a decreasing radius to four miles of rollers ending at a dam at Alpine Lake. A three-mile ascent takes riders to Ridgecrest.   Here we diverge from the road riders again and make a right turn  to the next 11 mile section of gravel and  trail across the Bolinas Ridge.  The views are spectacular as and we descend to Sir Francis Drake. Watch out for the cows!  A right turn takes you back out onto the the road for a quick descent to the left turn on Platform Bridge where you'll find a water stop.
We then continue on Platform Bridge Rd where it joins Pt. Reyes Petaluma road before we continue  traveling inland to the Nicasio Reservoir and right turn on Nicasio Valley Rd. A relatively flat stretch leads to the 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.


MT TAM DOUBLE CENTURY 

No Mt Tam Double this year.  We hope to resume  in the future. 


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.