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Triathlon Calendar near Newcastle 2025-2026

Explore the top triathlons near Newcastle for 2025-2026! We've gathered 85 exciting races in the area. Check out our detailed list below to find your next local race.

March 2025
Mar
15
Saturday

Woodinville Leprechaun Leap 10K

5 km 10 km
Mar
15
Saturday

Run The Green

10 km 13 mi
Mar
15
Saturday

St. Paddy's Day Run

5 km 10 km 13 mi
Mar
15
Saturday

Kirkland Shamrock Run

5 km
Mar
16
Sunday

St. Patrick's Day Dash

5 km
Mar
22
Saturday

Dash Point Trail Run

Trail Run 10 km 13 mi
Mar
22
Saturday

A2PT 5k MS Fundraiser

Trail Run 5 km
Mar
22
Saturday

Spring Run for Fun @ Bridle Trails

Trail Run 5 km 10 km 13 mi 26 mi
Mar
22
Saturday

Fall City Classic

5 km 8 km 13 mi
Mar
22-23
Sa - Su

Seattle Cherry Blossom Run

5 km 10 km 13 mi
Mar
22
Saturday

Leif to Leif 5k Fun Run/Walk

5 km
Mar
23
Sunday

World's Fastest 10k

10 km
Mar
29
Saturday

Dizzy Daze

Backyard Ultra 3 mi
April 2025
Apr
5
Saturday

Tenacious 10

10 km 10 mi
Apr
6
Sunday

I Love the 90s 5K

5 km
Apr
12
Saturday

Cottontail 6 & 12 Hour

Backyard Ultra 6 hr 12 hr
Apr
12
Saturday

Jill's Twelve Hour Run, Marathon & Half Marathon

12 hr
Apr
12
Saturday

Loop the Lookout Trail Run

Trail Run 5 km 10 km 15 km
Apr
19
Saturday

Squak Mountain Trail Run

Trail Run 12 km 13 mi 50 km
Apr
19-20
Sa - Su

Last Fool Standing

Backyard Ultra 5 km
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