Boise River MarathonBoise ID
26.2Marathon
$60
Sunday, May 2, 2027 · Boise, Idaho
26.2 miles along the Boise River, out and back to a turnaround at Lucky Peak State Park — 100% pavement, 100% ADA compliant, fully car-free, with cottonwoods leafing out, snowmelt running high, and Boise blooms around every corner. Four distances, one riverside finish festival.
Registration
Free distance transfers until April 1 · Deferral to 2028 available until March 15
The course
Early May in the Treasure Valley means the Boise River is running full with mountain snowmelt, the Greenbelt's cottonwoods are freshly leafed out, and the foothills have gone green for a few short weeks before summer. The marathon starts and finishes at 250 E Parkcenter Blvd, Boise, running out along the river to a turnaround at Lucky Peak State Park and back — 26.2 miles round trip.
The route is 100% pavement and fully car-free the entire way, well shaded, and never far from moving water. It's one of the fastest courses in the region, popular with runners chasing a Boston-qualifying time.
Marathon route on Strava.
Half Marathon route on Strava.
10K route on Strava.
5K route on Strava.
Every distance is its own out-and-back along the Boise River Greenbelt, starting and finishing at 250 E Parkcenter Blvd.
Race weekend
250 E Parkcenter Blvd, Boise — grab your bib, shirt, and race guide.
Can't make it? Race-morning pickup opens at 5:00 AM.
Can't make Saturday? Grab your bib at 250 E Parkcenter Blvd starting at 5:00 AM.
Drop your bag at Parkcenter Blvd before the corrals fill in.
Sunrise send-off along the Greenbelt, headlamps optional for the out-leg to Lucky Peak.
6:30 after the marathon start. We'll be cheering to the last finisher.
Every entry includes
A Boise River Marathon shirt in this year's design. Guaranteed for everyone registered by April 1.
A custom river-stone finisher medal for every finisher, every distance.
Live splits and finish alerts your family can follow from anywhere on the course — or from home.
Pro photographers at the start, mid-course, and the finish. Full-resolution downloads, no watermarks.
Water, electrolytes, and gels on course, staffed by Treasure Valley running clubs. Finish food and drink included.
Start and finish are the same spot, so there's no shuttle to catch — park once at Parkcenter Blvd and you're done for the day.
Race gear
Every registered runner gets a finisher medal and this year's 3/4-sleeve race shirt, both waiting for you at packet pickup.
Medals are easy — we order plenty. Shirts are trickier, since we don't know sizes until people register. Register by April 1 to guarantee yours; after that we order extras but can't promise a size.
More BRM gear in this year's print
Tickets and gear go on one order. Already registered? Order gear on its own.
Ask at the merch table at packet pickup or the finish festival to pick up extra pieces in this year's print.
Questions
Start and finish are both at 250 E Parkcenter Blvd, so there's no shuttle needed — park for free on-site. The course runs out along the Greenbelt to a turnaround at Lucky Peak State Park and back to the same spot you parked.
Yes — transfers between distances are free until April 1. If you move to a shorter distance we'll refund the difference; moving up just costs the difference between entry fees.
Yes — the price you pay is whatever's current the moment you check out, and each distance climbs through several price steps between now and race week:
Marathon: $60 now → $110 on Nov 1, 2026 → $125 on Jan 1, 2027 → $135 on Feb 1, 2027 → $145 on Mar 1, 2027 → $155 on Apr 1, 2027.
Half Marathon: $50 now → $65 on Oct 31, 2026 → $85 on Nov 1, 2026 → $100 on Dec 1, 2026 → $115 on Jan 1, 2027 → $120 on Feb 1, 2027 → $125 on Mar 1, 2027 → $130 on Apr 1, 2027.
10K: $45 now → $55 on Nov 1, 2026 → $60 on Jan 1, 2027 → $65 on Feb 1, 2027 → $70 on Mar 1, 2027 → $80 on Apr 1, 2027.
5K: $35 now → $40 on Nov 1, 2026 → $45 on Jan 1, 2027 → $50 on Feb 1, 2027 → $55 on Apr 1, 2027.
Entries are non-refundable, but you can defer to the 2028 race for free until March 15, or transfer your bib to another runner until April 1.
Headphones are fine — keep one ear open, since the Greenbelt stays open to the public. Strollers are welcome in the 5K. Dogs love the Greenbelt but have to sit this one out.
We run rain or shine — early May in Boise usually means a crisp mid-40s start warming into the mid-60s by early afternoon, with a chance of a passing spring shower. Only a safety emergency (lightning, high water on the Greenbelt) delays or shortens the course, and we'll email and text every runner directly if plans change.