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Portola Valley – Junipero Serra Boulevard loop from Belmont

Portola Valley – Junipero Serra Boulevard loop from Belmont

Hard

4.9

(7540)

18,405

riders

Portola Valley – Junipero Serra Boulevard loop from Belmont

04:16

85.6km

1,210m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: July 10, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Wunderlich County Park

Foothills Nature Preserve

Waypoints

Start point

Train Station

Get Directions

7.11 km

View of Crystal Springs Reservoir from Cañada Road

Highlight (Segment) • Viewpoint

Bike Sunday - no motorized vehicles on Sundays, we've got the whole road for ourselves.

Tip by

23.1 km

Tree Tunnel on Portola Road

Highlight (Segment) • Natural

I road though here after coming down La Honda road, thought it was a really pretty part of the road and it covered l connects back to Sand Hill road

Tip by

24.8 km

The ride takes you through the (very) well-to-do town of Portola Valley, which usually ranks as one of the top 10 in the US in terms of average household income. You may have heard that Portola Valley has a higher population of horses than of people. While that seems to have been true only in much earlier years, this is still a town with a very high rate of horse ownership and, just like in the neighboring Woodside, you shouldn't be surprised if you encounter residents heading to the corner store on horseback.

Tip by

39.8 km

Vista Point View in Foothills Nature Preserve

Highlight (Segment) • Viewpoint

Steep, but very pretty views at the top and looking back during the climb

Tip by

45.3 km

Altamont Road Vineyard

Highlight (Segment) • Structure

Winding through a quiet residential area with minimal traffic, Altamont Road is perfect for a laid-back ride or linking up with tougher routes nearby. The gentle climbs make it super relaxing, and the hill views are awesome—especially around sunrise or sunset. It’s bike-friendly, but watch out for the occasional car on the narrower sections.

Tip by

55.8 km

Junipero Serra Boulevard

Highlight (Segment) • Cycleway

Junipero Serra Boulevard has a generous, paved bike lane in both directions for the entire length of the ride.
Car traffic is everpresent on this route, and it can get particularly busy during commute hours on weekdays, though this shouldn't concern you much because (other than having to switch to the left-hand side of the right-turn lane at some intersections) you will be mostly independent of the traffic lanes in your own bike lane during this ride. Meanwhile, weekends with good weather will result in heavy bicycle traffic, in which case it would be worthwhile to pay extra attention to fast riders that might be approaching from behind, at least when you're stopping or resuming after a stop.

Tip by

64.4 km

Manzanita Way

Highlight (Segment) • Cycleway

Most boiler-template routes for this immediate area use Whisky Hill Rd. to get back and forth. Manzanita is several levels better (which includes a brief stretch of Mountain Home). Almost no cars, canopied and bucolic, it's perfect on a bike. So, substitute this for any Whiskey Rd routes!

Tip by

75.3 km

Pulgas Water Temple

Highlight • Monument

San Francisco built Pulgas Water Temple as a monument to the engineering marvel that brought Hetch Hetchy water more than 160 miles across California from Yosemite National Park in the Sierra Nevada Mountains to the Bay Area. The Hetch Hetchy Project took 24 years to build through the Great Depression at a cost of $102 million.
On October 28, 1934, the roar of Hetch Hetchy mountain water greeted everyone gathered at Pulgas Water Temple to celebrate its arrival. With vivid memories of the fire that had raged after the Great Earthquake of 1906, the city rejoiced in its new secure, plentiful supply of high quality drinking water. The frieze above the columns expresses the city’s relief: “I give waters in the wilderness and rivers in the desert, to give drink to my people.”
Pulgas Water Temple was designed in the Beaux Arts style by William Merchant, a San Francisco architect trained by Bernard Maybeck. Merchant’s design featured fluted columns and Corinthian capitals to reflect the architecture of ancient Greeks and Romans, whose engineering methods were used to build the new water system. Artist and master stone carver Albert Bernasconi brought Merchant’s drawings to life.
Pulgas Water Temple is located about one-half mile south of the Cañada Road trailhead.
Open free to bikers & pedestrians every day, car parking opens only M-F 9-4
sfwater.org/index.aspx?page=93
Biketrail with more highlights and annotated photos at komoot.com/tour/11413421

Tip by

85.6 km

End point

Train Station

Way Types & Surfaces

Way Types

49.5 km

25.1 km

10.4 km

359 m

212 m

116 m

Surfaces

81.7 km

3.75 km

254 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (270 m)

Lowest point (10 m)

Weather

Today

Saturday 25 July

24°C

14°C

0 %

Additional weather tips

Max wind speed: 24.0 km/h

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Comments

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Portola Valley – Junipero Serra Boulevard loop from Belmont

View of Crystal Springs Reservoir from Cañada Road

Tree Tunnel on Portola Road

Portola Valley

Vista Point View in Foothills Nature Preserve

Altamont Road Vineyard

Junipero Serra Boulevard

Manzanita Way

Pulgas Water Temple

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