IRONMAN 70.3 Northern California 2027
A 70.3 at Redding: a swim in Whiskeytown Lake, a rolling bike through Shasta County with a net downhill and a run along the Sacramento River Trail over the Sundial Bridge.
33 weeks to race day: base season
Plenty of runway. This far out, the win is a boring, consistent base rhythm: aerobic volume, strength, technique. The structured block starts closer in; what you do now decides how high it can climb.
Building for this one? 70.3 training plan covers the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.
Build my complete road.
Commit to the date and the work gets a shape: your countdown starts, the emails arrive in step with your build, and the app anchors a recovery-led block so the final week lands exactly on race day.
One confirmation email, then the road begins. Registering for the race itself stays with the organiser.
“The organiser describes rolling terrain with a net loss of nearly 1,000 feet, so train for rolling riding as well as for fast sections. The run uses the Sacramento River Trail and the Sundial Bridge.”
The race
The course
Swim in Whiskeytown Lake. Wetsuits are legal at 24.5°C (76.1°F) or colder, up to 5 mm thick, and prohibited above that.
A 90 km course through Shasta County with rolling terrain and smooth roads, and a net elevation loss of nearly 1,000 feet (about 300 m), according to the organiser.
Along the Sacramento River Trail, across the Sundial Bridge and through riverfront parks to a finish near downtown Redding.
Not yet confirmed for this edition: bike elevation gain, cut-off times, aid station spacing, water temperature history, course maps (not checked against official GPX), bike lap count. We publish these only once they are on the official course page, so check there before you pace off anything here.
Course details verified against the official IRONMAN 70.3 Northern California course page on 4 October 2026. Courses change; the official page is always the last word.
Questions, answered
When is IRONMAN 70.3 Northern California 2027?
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Read before you race
Half Ironman Recovery Time: A Practical Return
How Much Harder Is a Full IRONMAN Than a 70.3?
IRONMAN 70.3 Tallinn Training Guide
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This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 Northern California or its organiser. Details are based on publicly available information; names are used descriptively to identify the event. For accurate, up-to-date information and entry, always use the official event website.