Triathlon Events in United States 🇺🇸 2026 — Calendar

48 Upcoming triathlon events listed in United States from June 2026 to December 2027 with the most events in California (8), New York (5) and Wisconsin (5), including Ironman 70.3 Happy Valley and IRONMAN 70.3 NEW YORK.

101 Athletes targeting these events on Intervals.icu

Jun 13, 2026

IM 70.3 Boulder

Boulder, CO, USA Swim Ride Run
Jun 13, 2026

Patriot Half

Half distance triathlon
East Freetown, Freetown, MA, USA Swim Ride Run
Jun 14, 2026

Ironman 70.3 Happy Valley

Happy Valley
1 Beaver Stadium, University Park, PA 16802, USA Ride Run Open Water Swim
Jun 14, 2026

IRONMAN Rockford 70.3

Rockford, IL, USA Open Water Swim Ride Run
Jun 14, 2026

Monte Rio Triathlon

Triathlons of varying distances
Monte Rio, CA, USA Swim Ride Run
Jun 21, 2026

Motor City Triathalon

Olympic Tri
Belle Isle, Detroit, MI, USA Run Open Water Swim Ride
Jun 28, 2026

Cal Tri La Crema

Cal Tri La Crema starts at iconic Johnson's Beach with a Russian River swim, includes a scenic bike ride along River Roa…
16215 First St Swim Ride Run
Jun 28, 2026

Cohasset Triathlon

Cohasset, MA, USA Open Water Swim Ride Run
Jul 11, 2026

Ironman 70.3 Muncie

Muncie, IN, USA Open Water Swim Ride Run
Jul 11, 2026

Lake Whatcom Triathlon

https://www.lakewhatcomtriathlon.com/?nis=6&ch=1
2114 Electric Ave, Bellingham, WA 98229, USA Ride Open Water Swim Transition_sport Run
Jul 11, 2026

Litchfield Hills Olympic Triathlon

Litchfield Hills Triathlon
580 West Hill Road New Hartford CT Open Water Swim Ride Run
Jul 12, 2026

70.3 Musselman

35 Lake Front Drive, Geneva, NY 14456 Ride Run Swim
Jul 12, 2026

Ironman 70.3 Musselman

Geneva, NY 14456, USA Swim Ride Run Transition_sport
Jul 19, 2026

CU Triathlon

2501 Fields S. Drive Ride Run Swim
Jul 19, 2026

Ironman Lake Placid 2026

IRONMAN Lake Placid is a truly magical event that draws athletes from all corners of the globe. Every aspect of this unf…
Lake Placid, NY 12946, USA Open Water Swim Ride Run
Jul 25, 2026

Mountain Lakes Triathlon

Sprint & Olympic distance triathlons
Guntersville, AL, USA Ride Run Swim Transition_sport Other
Jul 26, 2026

Chisago Lakes Sprint Triathalon

EVENT DETAILS The swim is at beautiful Paradise Park at Chisago Lake in Chisago City. In water start with waves of arou…
11031 Stinson Ave, Chisago City, MN 55013, USA Run Ride Swim
Jul 26, 2026

Ironman 70.3 NM

Ironman 70.3 Ruidoso New Mexico
Socorro, NM 87801, USA Ride Run Swim
Jul 26, 2026

Steamboat Lake Sprint Triathlon

- [www.withoutlimits.co](http://www.withoutlimits.co) - [www.TriReg.com/2100](https://www.TriReg.com/2100) Categorie…
61105 Rcr 129, Clark, CO, 80428 Swim Ride Run
Aug 8, 2026

USAT National Championships - Olympic

Milwaukee, WI, USA Swim Ride Run Transition_sport
Aug 9, 2026

USAT National Championships - Sprint

Milwaukee, WI, USA Swim Ride Run Transition_sport
Aug 10, 2026

USA Triathlon National Championships

USAT National Championship
Milwaukee, WI, USA Transition_sport Other
Aug 16, 2026

Ironman 70.3 Northern California

Redding, CA, USA Ride Run Swim
Aug 23, 2026

Chicago Triathlon

Olympic and Sprint Triathlon
Chicago, IL, USA Ride Run Open Water Swim
Sep 12, 2026

Ironman Wisconsin 70.3

Madison, WI, USA Open Water Swim Ride Run
Sep 13, 2026

IRONMAN 70.3 Santa Cruz

IRONMAN 70.3 Santa Cruz
400 Beach St, Santa Cruz, CA 95060, USA Ride Run Swim
Sep 13, 2026

Ironman Wisconsin

Madison, WI, USA Open Water Swim Ride Run
Sep 19, 2026

IM Maryland

Cambridge, MD 21613, USA Run Open Water Swim Ride
Sep 20, 2026

IRONMAN 70.3 Washington Tri-Cities

https://www.ironman.com/races/im703-washington-tri-cities/course
500 Amon Park Dr, Richland, WA 99352, USA Ride Run Open Water Swim Transition_sport
Sep 26, 2026

Desert's Edge Triathlon Series

Welcome to registration for the **2026 Desert's Edge Triathlon Series**.  This event is being produced with people who…
1800 11 8/10 Rd, Loma, CO, 81524 Swim Ride Run
Sep 26, 2026

IRONMAN 70.3 NEW YORK

IRONMAN 70.3 New York at Jones Beach September, 26th, 2026.
Jones Beach, New York, USA Open Water Swim Transition_sport Ride Run
Sep 27, 2026

Apple Valley Reverse Triathlon

Sprint Reverse Triathlon
14999 Dale Evans Pkwy Run Ride Swim
Sep 27, 2026

Ironman Chattanooga

Chattanooga, TN, USA Swim Ride Run
Sep 27, 2026

Santa Cruz Triathlon

Santa Cruz, CA, USA Open Water Swim Ride Run
Oct 4, 2026

Waco 70.3

Waco, TX, USA Open Water Swim Ride Run
Oct 10, 2026

Big Apple Triathalon

Big apple
New York, NY, USA Ride Run Open Water Swim
Oct 17, 2026

IRONMAN 70.3 North Carolina

Wilmington, NC, USA Open Water Swim Ride Run Transition_sport
Oct 17, 2026

Wilmington 70.3

Wilmington, NC, USA Open Water Swim Ride Run
Oct 17, 2026

Wilmington 70.3

North Carolina, USA Open Water Swim Ride Run
Oct 18, 2026

Ironman Ca

Sacramento, CA, USA Open Water Swim Ride Run
Oct 24, 2026

NAPA Fall

7600 Knoxville Rd, Napa Open Water Swim Ride Run
Oct 24, 2026

The Edisto Island Triathlon Pro Am

3701 Docksite Road Edisto Island Ride Run Swim
Nov 7, 2026

IronMAN Florida 2026

Panama City Ride Swim Run Transition_sport
Dec 6, 2026

70.3 La Quinta

Ironman 70.3 La Quinta
La Quinta, CA, USA Ride Run Swim
Dec 13, 2026

Ironman 70.3 Florida

Haines City, FL, USA Open Water Swim Ride Run
Mar 7, 2027

Olympic Triathlon - Clermont

Clermont, FL, USA Other Open Water Swim Ride Run
Apr 24, 2027

Ironman Texas

Texas, USA Ride Run Swim
Apr 24, 2027

Ironman Texas

140.6 Miles
The Woodlands, TX, USA Open Water Swim Ride Run