In Palo Alto, California, runners and walkers are invited to experience a unique race series featuring four distinct events. The centerpiece of this lineup is the Double 15k (10k + break = 5k), where participants tackle two stages back-to-back for an exhilarating challenge. The event kicks off with a vigorous 10-kilometer run along a wide, paved path that winds through the picturesque Pal Alto baylands. After completing this initial leg and taking a halftime break of approximately one hour and forty-five minutes, runners set out on their second stage: a 5-kilometer sprint to the finish line. This format, known as Double Racing® or simply "Double," combines two separate races into one cohesive event where times from both stages are summed for final scoring. Completing both legs is essential to secure an official time and compete in the overall standings. In addition to the main race, there's also a standalone Palo Alto 10k that offers runners another chance to explore the scenic baylands at their own pace without the break between stages. For those looking for something more relaxed or with younger family members, the Palo Alto 5K Run/Walk and Bob Anderson’s Kids Mile (for children aged 13 and under) provide enjoyable alternatives. This festive pre-Christmas event has been a beloved tradition since 2012, drawing participants of all ages to enjoy the serene beauty of the baylands while engaging in friendly competition. Whether you're an experienced runner or someone looking for a family-friendly outing, there's something here to suit every level and interest. The atmosphere is lively and supportive, making it perfect for runners who want to push their limits alongside fellow enthusiasts or simply enjoy the scenic surroundings with loved ones.
Races Offered
Kids 1 Mile
Dec 12, 2026
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Distance —
1.6K
terrain
Type —
Running
timer
157 days remaining
sell
$14.82
Palo Alto 10K
Dec 12, 2026
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Distance —
10K
terrain
Type —
Running
timer
157 days remaining
sell
$59.29
Palo Alto Double 15K
Dec 12, 2026
straighten
Distance —
15K
terrain
Type —
Running
timer
157 days remaining
sell
$59.29
UjENA 5K
Dec 12, 2026
straighten
Distance —
5K
terrain
Type —
Running
timer
157 days remaining
sell
$59.29
Weather History
These values represent the 3-year monthly averages for December in Palo Alto.
thermostatTemperature
8.4° / 15.5°
wb_sunnyFeels like
6.9° / 14.3°
light_mode
Avg sunshine hours
6h 39m
water_drop
Avg rainfall
4.0 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
4.9 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.0)
humidity_mid
Humidity
83.4%
wb_twilight
Sunrise
08:15
nightlight
Sunset
17:53
About Palo Alto
Learn more about the host city, Palo Alto.
Palo Alto is a bustling suburb in Santa Clara County south of the city of San Francisco. It is adjacent to Stanford University and home to hundreds of Silicon Valley technology companies, ranging from VMware and Hewlett-Packard to tiny startups operating in garages.
