Jacksonville Marathon training plan: course, start dates, and plan options
Jacksonville, FLDecember 12, 2026
The Jacksonville Marathon is about as flat as a road marathon gets. The entire course sits between roughly 5 and 29 feet above sea level, with about 219 feet of cumulative climb and 220 feet of descent across all 26.2 miles, which nets out to a single foot. It is run as an out and back in mid December, and 703 people finished it in 2025.
Answer a few questions, choose your plan, then create your account and subscribe to start training in Stride.
That profile is a gift and a trap. Nothing on this course will slow you down, which means nothing on this course will make you change what you are doing either. Flat races are won and lost on pacing discipline and on how well your legs tolerate doing one identical thing for three or four hours straight.
79 days to race day
Jacksonville Marathon · December 12, 2026 · about 11 weeks out
Your plan starts with your race and works backward. Every week lands on a real calendar, with race day at the end.
When to start training for the Jacksonville Marathon 2026
Race day is December 12, 2026, which is 79 days from today. Counting back from that date, here is when each length of build starts.
- 30-week buildWindow has passed
- 24-week buildWindow has passed
- 18-week buildWindow has passed
- 16-week buildWindow has passed
- 12-week buildshortest Stride acceptsWindow has passed
You have about 11 weeks until race day, which is inside the shortest build Stride matches. Stride won’t pretend there is room for a responsible full build. You can still use the finder to check your starting point, then choose a later race if this runway is too short.
Answer a few questions, choose your plan, then create your account and subscribe to start training in Stride.
Jacksonville Marathon course facts
- Course
- Out and Back · Very Flat · Road/Pavement
- Elevation gain / loss
- 219 ft gain, 220 ft loss
- Highest / lowest point
- 29 ft / 5 ft
- Marathon finishers
- 703 in 2025 (small field)
- Boston qualifier
- Certified Boston qualifying course
- Finishers running a qualifying time
- 14.4% in 2025
- Typical race morning
- 57°F at the start, 88% humidity, overcast
- Race day high / low
- 61°F / 44°F on average
Let’s find the plan for you.
Your race, current mileage, longest run, marathon experience, and available days decide the best fit. Stride maps the plan you choose to race day at the Jacksonville Marathon.
- Stride Run-Walk FinisherThree sessions a week with planned walk breaks, cover the full distance before race day.
- Stride First MarathonThe classic four-day first-marathon build: easy running and one weekly long run, no speedwork.
- Stride First Marathon PlusA first-marathon build with a little more volume and weekly race-pace miles.
- Stride 6-Day FinisherFinish your first marathon on frequency: six easy-leaning runs a week, no monster long runs.
- Stride 5-Day Pace BuilderFive days a week with race-pace runs before your long runs, built for a mid-pack time goal.
- Stride 6-Day RhythmSix days a week with three quality sessions, steady fatigue that teaches you to finish strong.
- Stride Time-Based FoundationFive time-based runs a week, mostly easy, the injury-averse way to a strong finish.
- Stride Time-Based BuilderSix time-based runs a week at a strict 80% easy / 20% hard split, chase a time goal without breaking.
- Stride 3-Day Cross-TrainThree runs plus two cross-training days over 24 weeks, marathon fitness on a busy schedule.
- Stride 3-Day QualityExactly three hard runs plus two mandatory cross-training sessions, every workout counts.
- Stride 6-Day CumulativeThe six-day cumulative-fatigue build with quality from week two, for PR chasers with a base.
- Stride Threshold 55The serious BQ/PR build to 55 miles a week: threshold work, medium-long runs, and 20-milers.
- Stride Threshold 70The high-mileage BQ/PR build to 70 miles a week for veterans with a deep base.
- Stride 2-Quality FlexTwo fixed quality sessions a week, everything else flexible easy running, fits any schedule.
Answer a few questions, choose your plan, then create your account and subscribe to start training in Stride.
Choose your Jacksonville Marathon training window.
Compare 12, 16, 18, and 20 weeks counted back from race day. The 18-week option includes the complete four-day schedule.
The course: 24 feet of vertical range, out and back
The Jacksonville Marathon runs an out and back course whose entire vertical range is about 24 feet, from a low near 5 feet to a high near 29. Cumulative climb across the full 26.2 is roughly 219 feet, which is road camber, bridge approaches and drainage rather than anything you would call a hill. Net elevation change for the race is one foot.
The out and back shape gives you one thing a loop cannot: an honest audit. When you hit the turnaround you know exactly what your first half cost, and you know what the wind is going to do to you on the way home, because you have just spent 13 miles finding out. Use that. Most people who blow up on flat courses do it before they ever reach the halfway mark.
We could not verify the start location, start time, course time limit or any named landmarks for this race from an official source, so none appear here. Get the current athlete information directly from the organizers when you register, particularly the cutoff if you plan to be out past five hours.
How to train for the Jacksonville Marathon
Train for the Jacksonville Marathon the way you would train for a track race stretched out over 26 miles: even effort, even cadence, no surges. With 24 feet of vertical range there is no terrain to force a change of gear, so your long runs should be flat, continuous, and run at a pace you could hold for another 45 minutes when you finish. Practicing restraint is the workout.
The specific cost of flat ground is repetition, not effort. Same muscles, same joint angles, same footstrike, for the entire race. Build a strength routine that covers what the course will not: single leg loading, calf and soleus work, and some hill or stair repeats even though the race has none, purely so your legs have been asked to do something else recently.
Then plan around the calendar. A December race means your build runs through late summer and autumn, and race morning in Jacksonville is usually humid even when it is cool. Do a meaningful share of your long runs in humid air, and pin down your fluid plan in those conditions rather than in a dry October week.
Finally, use the turnaround as a training cue. In two or three of your long runs, go out to a fixed point and come back, with a rule that the return half is run faster than the first. That builds the pacing habit the shape of this course rewards.
Getting in
Getting into the Jacksonville Marathon should be straightforward given roughly 700 marathon finishers a year, but at the time of writing the race's own website is not serving a valid security certificate and the title sponsor's event page is not publicly accessible. That is a website problem, not a sign the race is gone.
The practical move is to find the current registration listing directly rather than relying on any cached page, and to confirm date, start time and cutoff with the organizers at the same time. Do not assume last year's details still apply.
Where does the Jacksonville Marathon get hard?
Miles 20 to 26 on the return leg, where 20 miles of identical strides on flat road have loaded the same muscles the same way the entire time and there is no change of terrain left to bail you out.
What is the weather like at the Jacksonville Marathon?
Race morning in Jacksonville usually starts around 57F with humidity near 88% under overcast skies and a light southerly breeze, and the day rises to an average high near 61F. That is a mild racing temperature carrying a lot of moisture, which is a combination that feels easy for an hour and expensive after two. Train some long runs in humid air so a damp start does not push your heart rate somewhere you did not plan.
Is the Jacksonville Marathon a good Boston qualifier?
Jacksonville is a certified Boston qualifying course, and 14.4% of finishers ran a qualifying time in 2025, up from 11.4% in 2024 and 9.4% in 2023. With effectively no net elevation change, nothing about the profile triggers the BAA's net downhill adjustment, so a time run here counts at face value. It is a credible flat qualifier without the sub-freezing risk of a northern winter race.
Is the Jacksonville Marathon a good first marathon?
The profile suits a first marathon well: flat, an out and back you cannot get lost on, and a field of about 700 rather than 30,000. The reservation is practical rather than physical. We could not confirm a published course time limit, so if you expect a finish past five hours, get that answer from the organizers before you commit.
Jacksonville Marathon questions, answered.
How flat is the Jacksonville Marathon?
Extremely. The whole course sits between roughly 5 and 29 feet above sea level, and it accumulates about 219 feet of climb and 220 feet of descent over the full 26.2 miles, for a net change of one foot. There is no hill anywhere on it, only camber and drainage.
Is the Jacksonville Marathon a good Boston qualifier?
It is a solid one. The course is certified and 14.4% of finishers ran a Boston qualifying time in 2025, after 11.4% in 2024 and 9.4% in 2023. Because the course has effectively no net drop, no downhill adjustment applies to times run there, so what you run is what counts.
What is the weather like at the Jacksonville Marathon?
Mild and damp. Race morning typically starts near 57F with humidity around 88% and overcast skies, and the day reaches an average high near 61F. That is good racing temperature carrying heavy moisture, so sweat evaporates slowly. Practice your fluid plan in humid conditions rather than in dry autumn air.
Is a flat marathon actually easier to run?
Easier to pace, harder on your legs than people expect. On a course with 24 feet of vertical range, nothing forces you to change stride or recruit different muscles, so fatigue builds in one place instead of being spread around. Add strength work and some hill repeats in training even though the race has none.
Where does the Jacksonville Marathon get hard?
Miles 20 to 26 on the return leg, where 20 miles of identical strides on flat road have loaded the same muscles the same way the entire time and there is no change of terrain left to bail you out.
What is the weather like at the Jacksonville Marathon?
Race morning in Jacksonville usually starts around 57F with humidity near 88% under overcast skies and a light southerly breeze, and the day rises to an average high near 61F. That is a mild racing temperature carrying a lot of moisture, which is a combination that feels easy for an hour and expensive after two. Train some long runs in humid air so a damp start does not push your heart rate somewhere you did not plan.
Is the Jacksonville Marathon a good Boston qualifier?
Jacksonville is a certified Boston qualifying course, and 14.4% of finishers ran a qualifying time in 2025, up from 11.4% in 2024 and 9.4% in 2023. With effectively no net elevation change, nothing about the profile triggers the BAA's net downhill adjustment, so a time run here counts at face value. It is a credible flat qualifier without the sub-freezing risk of a northern winter race.
Is the Jacksonville Marathon a good first marathon?
The profile suits a first marathon well: flat, an out and back you cannot get lost on, and a field of about 700 rather than 30,000. The reservation is practical rather than physical. We could not confirm a published course time limit, so if you expect a finish past five hours, get that answer from the organizers before you commit.
When should I start training for the Jacksonville Marathon 2026?
Race day is December 12, 2026. Counting back from that date, a 20-week build starts around July 25, 2026, a 16-week build around August 22, 2026, and a 12-week build around September 19, 2026. Already inside that window? Stride maps a plan from today to race day, whatever the runway.
How does Stride's Jacksonville Marathon plan work?
Download the app, pick the Jacksonville Marathon as your race, and answer a few questions about your recent running and your weekly schedule. Stride matches you to one of 14 marathon plans, maps every week from today to December 12, 2026, adjusts when life gets in the way, and puts you in a feed of runners training for the same race.
Choosing a training app?
A Jacksonville Marathon buildup is months of your life. See how Stride compares before you commit it to an app.
Find your plan.
Your race, current mileage, recent longest run, goal, and run days determine which plans rank first. Choose one and subscribe, then open every workout in Stride.