Settle
Weeks 1–2
Feb 8, 2027–Feb 21, 2027
Hold close to your current volume, establish the weekly rhythm, and make sure the opening load is honest.
12-Week Boise River Marathon Training Plan
Boise, IDMay 2, 2027
Start around February 7, 2027. The calendar below gives each phase a real date, then the course guidance shows where to make the build specific to Boise River Marathon.
The Boise River Marathon is 26.2 miles of paved riverside path, out and back, with 283 finishers in 2026. The race describes its own course as flat, fast and scenic, following the Boise River from a rocky canyon into the middle of the city before turning you around to run all of it again in reverse.
- Race day
- May 2, 2027
- Start window
- February 7, 2027
- Runway
- 12 weeks
- Course
- Rolling Hills · Out and Back
- Plan choice
- Current training
Does this window fit your starting point?
Use this window when your recent training is steady and the opening week will not be a mileage jump. If you are returning after a long break, twelve weeks is too little room to rebuild and peak at the same time.
- Your weekly mileage has been consistent for the last six to eight weeks.
- You have completed recent long runs and do not need to rebuild from three easy miles.
- You can protect the same number of run days from week one through race week.
- You are prepared to begin race-specific work early instead of using a long base phase.
The 12-week Boise River Marathon calendar
These dates define the job of each phase. Your current mileage, recent longest run, experience, goal, and available days still decide the actual workouts inside them.
Build
Weeks 3–7
Feb 22, 2027–Mar 28, 2027
Grow the long run and weekly work with step-back weeks intact. There is no room to repay missed mileage.
Peak
Weeks 8–10
Mar 29, 2027–Apr 18, 2027
Complete the most race-specific long runs, rehearse fueling, and practice the terrain that will decide the final 10K.
Taper
Weeks 11–12
Apr 19, 2027–May 2, 2027
Reduce volume, keep the routine familiar, and arrive on race day without trying to squeeze in one more big week.
Make the window specific to Boise River Marathon.
Course-specific work starts early in a 12-week build. Put the race's terrain and expected conditions into long runs once the opening weeks feel controlled, without adding extra hard days.
Read the full race guideHow to train for the Boise River Marathon
Train for the Boise River Marathon by building tolerance for repetition. The most useful sessions are long runs on a flat paved path, solo, at goal effort, with no company and nothing to look at, because that's exactly what race day is. Learn what your goal pace feels like when nothing outside you changes for hours.
Then protect your legs from that repetition. Add short hill repeats or gentle strides on grass once a week, not because the course has hills but because varying your stride angle keeps calves and hip flexors from grinding down over a whole training block of flat path running.
Last, rehearse the turnaround. Run a long out and back where you deliberately hold something back on the way out, so that seeing the halfway cone feels like a start rather than a verdict.
Boise River Marathon course facts
- Course
- Out and Back · Rolling Hills · Road/Pavement
- Marathon finishers
- 283 in 2026 (very small field)
- Boston qualifier
- Not a certified Boston qualifying course
- Race day high / low
- 69°F / 44°F on average
Let your current training decide the actual plan.
Current mileage, recent longest run, marathon experience, goal, and available days determine which plans rank first. After you choose and subscribe, Stride dates every workout through May 2, 2027.
12-week Boise River Marathon plan questions, answered.
When should I start a 12-week Boise River Marathon plan?
The 2027 Boise River Marathon is scheduled for May 2, 2027, so the 12-week window opens around February 7, 2027. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.
Is a 12-week plan long enough for the Boise River Marathon?
Use this window when your recent training is steady and the opening week will not be a mileage jump. If you are returning after a long break, twelve weeks is too little room to rebuild and peak at the same time. The course does not change the opening load you can handle, so choose from your current mileage and recent longest run before adding race-specific terrain.
How should I prepare for the Boise River Marathon course in 12 weeks?
Course-specific work starts early in a 12-week build. Put the race's terrain and expected conditions into long runs once the opening weeks feel controlled, without adding extra hard days. Train for the Boise River Marathon by building tolerance for repetition. The most useful sessions are long runs on a flat paved path, solo, at goal effort, with no company and nothing to look at, because that's exactly what race day is. Learn what your goal pace feels like when nothing outside you changes for hours.
What if the 12-week Boise River Marathon window has already started?
Do not double weeks or cram missed mileage into the remaining calendar. Use your current mileage, recent longest run, experience, goal, and available days to choose a plan that can enter at an appropriate point while preserving the taper.
Is the Boise River Marathon flat?
The race calls its course flat, fast and scenic, following the Boise River on paved path. Some race listings label the profile as rolling, which is a mismatch worth knowing about, and no elevation figures are published for the course. Either way, this is not a hilly marathon and there's no signature climb to train for.
Is the Boise River Marathon a good first marathon?
Yes. A flat paved out and back with hydration roughly every two miles and a 6:30 a.m. start removes most of what goes wrong in a first marathon. The main challenge is solitude: 283 people finished in 2026, so practice long runs alone at goal effort before race day.
Put the 12-week window against your actual race.
Each page counts back from race day, maps the 4 phases to real dates, and applies the window to that course and its typical conditions.