HalfRuns
Diablo Trails Challenge

Diablo Trails Challenge

Race Date

Apr 4, 2026

Location

Walnut Creek, CA

Solid Pick55

The Experience

50K, half marathon 10K and 5K.

Course Info

Course Type

Loop Course

Terrain

road

Difficulty

Ultra-Flat

Elevation Gain

0'

Net Drop/km

0 m (Flat)

Separation

0.0%

Also Offers

31.1 Miles6.22 Miles3.12 Miles13.1 Miles

Quality Score

Solid Pick55
Methodology
Heritage14/20

7 years running

Size11/15

~160 finishers a year

Momentum5/5

growing or steady

Loyalty13/20

13% returning runners

Course & details3/15

4 timing sources

National draw4/10

runners from 4 states

Front-pack speed1/5

winner 1:33:00

Weather5/10

typical high 66°F

Race Day Weather

5-year historical avg

Start (Low)

45°

Afternoon (High)

66°

Pleasant conditions — light layers at start, comfortable by finish

0.0"

Precipitation

9 mph

Wind

68%

Humidity

Historical Finish Times

How 1,369 finishers actually crossed the line across 7 years.

Most recent

2026

Total finishers

1,369

Median time

2:46:59

Latest turnout

243

States

18

10%
25%
75%
90%
1:30p50 median ≈ 2:506:30

Turnout by year

20182026

'18'19'22'23'24'25'26
See full results

Hover the histogram to inspect specific finish times.

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