Fall half marathons fill up fast for a reason. Cool air, scenic courses, and a natural fitness peak after a summer of outdoor running make October and November races a sweet spot on the calendar. But showing up fit and ready requires more than a few long runs and good intentions. You need structure, and you need it now.
This 8-week plan is built for runners with a solid aerobic base, typically 20 to 30 miles per week, who want a clear, actionable ramp to race day. If you've been running consistently through summer, this will sharpen what you already have. If you took a few weeks off, there are adjustments below to bring you back safely before the real work begins.
Before You Start: Assess Your Base
Honest self-assessment matters more than optimism here. If you've been running 4 to 5 days a week through summer with at least one long run of 8 or more miles in recent weeks, you're ready to begin Week 1 of this plan as written.
If you took significant time off, say four or more weeks of minimal running, add a two-week re-entry phase first. Run easy, keep mileage under 20 miles per week, and only start the 8-week plan once a 10-mile long run feels manageable. Skipping this step is how runners end up injured by Week 4.
It's also worth noting that supplementing your running with resistance work pays dividends in the final weeks. Research consistently links lower-body strength training to improved running economy and reduced injury rates. If you're not already doing it, Strength Training Isn't Just for Gym Rats Anymore explains why adding even two sessions a week makes a real difference for endurance athletes.
The 8-Week Plan at a Glance
Each week includes four to five run days: one long run, one tempo workout, one or two easy recovery runs, and one optional strides or fartlek session. The remaining days are full rest or cross-training. Mileage builds progressively with a cutback week at Week 5 before the final push and taper.
- Week 1: 28 miles total. Long run: 10 miles easy. Tempo: 3 miles at comfortably hard effort. Two easy days at 5 to 6 miles each.
- Week 2: 31 miles total. Long run: 11 miles with the last 2 at goal race pace. Tempo: 4 miles. Easy days continue.
- Week 3: 34 miles total. Long run: 12 miles. Tempo: 4 x 1 mile at threshold with 90-second recoveries. Add strides twice this week.
- Week 4: 36 miles total. Long run: 13 miles, your dress rehearsal. Tempo: 5 miles continuous. This is your biggest week.
- Week 5 (Cutback): 27 miles total. Long run drops to 10 miles. One easy tempo at 3 miles. Your body absorbs the previous four weeks here.
- Week 6: 33 miles total. Long run: 12 miles with 4 miles at goal pace. Tempo: 3 x 2 miles at threshold. You should feel sharper now.
- Week 7 (Taper begins): 24 miles total. Long run: 9 miles easy. One short tempo of 20 to 25 minutes. Keep intensity but cut volume.
- Week 8 (Race week): 15 miles total before the race. Two easy shakeout runs of 3 to 4 miles. Strides on Thursday. Race Saturday or Sunday.
How to Run Your Key Workouts
Tempo runs are your most important training tool at this distance. Run them at an effort you could sustain for roughly an hour in a race, challenging but controlled. If you're using pace, that's typically 15 to 30 seconds per mile faster than your goal half marathon pace.
Long runs should feel easy for the first two thirds. Many runners make the mistake of running long runs too fast, which accumulates fatigue without building the aerobic base they're after. Save any goal-pace miles for the back half when your legs are already working.
Strides, short 20-second accelerations at mile pace, keep your legs sharp without adding meaningful stress. Run four to six of them after easy days, focusing on smooth form rather than maximum speed.
Adjusting for Your Summer
Runners coming off a strong summer base will find the early weeks of this plan feel relatively manageable. That's by design. Use Weeks 1 and 2 to refine your tempo pacing and dial in your long run effort rather than pushing harder than prescribed. Peaking too early is a real risk when fitness is already high.
If your summer was disrupted, heat training through July and August still builds aerobic capacity even if your paces were slower than normal. Research shows that heat adaptation produces many of the same physiological benefits as altitude training, including increased blood plasma volume and improved cardiovascular efficiency. Don't discount slower summer miles.
Runners returning from injury or a low-mileage summer should cap their long run at 10 miles through Week 3, even if the plan calls for more. Consistency over the full 8 weeks matters far more than any single workout.
Fall Race Conditions and Pacing Strategy
Cool fall temperatures are one of the biggest performance advantages runners have at October and November races, but they require a specific mindset. The drop from summer heat can make early miles feel almost effortless. That's a trap.
Studies on race pacing show that runners who go out 5 to 10 seconds per mile too fast in the first 5K significantly increase their odds of a blown second half. Fall air might feel crisp and forgiving, but your muscles, tendons, and glycogen stores don't know what the thermometer says. Even pacing from the gun remains the most reliable strategy for a strong finish.
The optimal racing temperature for most runners is somewhere between 44°F and 55°F (7°C to 13°C). If your fall race falls in that range, you may legitimately run a personal best. Factor this into your goal setting if your training has gone well.
One underappreciated adjustment in cooler weather is hydration. Runners consistently underdrink in fall races because they don't feel as thirsty. Thirst is a lagging indicator of dehydration regardless of temperature. Plan to drink at every aid station, roughly every 2 miles, and don't skip electrolytes just because you're not drenched in sweat.
Recovery Weeks and the Science Behind Them
The cutback in Week 5 isn't optional, and it isn't a sign that you're not working hard enough. Training adaptation happens during recovery, not during the hard sessions themselves. Skipping planned down weeks is one of the most common mistakes among self-coached runners.
Sleep is where most of this adaptation occurs. Research on endurance athletes consistently shows that getting fewer than 7 hours per night during a training block impairs muscle repair, reduces glycogen resynthesis, and increases injury risk. If you're serious about your fall race, treat sleep as part of the training plan.
Foam rolling, mobility work, and easy walking also help, but they're secondary to sleep and nutrition. On recovery days, genuine rest produces better outcomes than "active recovery" runs that drift too fast. If it's supposed to be easy, run easy enough that you could hold a full conversation.
Nutrition Considerations for the Build
Your fueling needs shift as weekly mileage climbs through Weeks 3 and 4. Carbohydrate intake should increase proportionally because that's your primary fuel at half marathon effort. Runners who cut carbs during high-mileage weeks often report persistent fatigue, poor session quality, and difficulty hitting tempo paces.
For long runs of 10 miles or more, practice your race-day nutrition strategy. That means carrying the same gels or chews you'll use on race day and taking them at the same intervals. Nothing new on race day is a rule every experienced runner knows and some still break.
If you're interested in how nutrition strategy ties into broader endurance performance, Nutrition as the 4th Triathlon Discipline: A Real Framework offers a practical model that translates directly to half marathon preparation, particularly around carbohydrate timing and pre-race loading.
Taper Without Losing Your Mind
The two-week taper in Weeks 7 and 8 will feel strange. You'll probably feel sluggish, anxious, and convinced that you've lost fitness. You haven't. Taper fatigue is physiological, not a sign that something is wrong.
Keep your intensity sessions in Week 7 but cut the volume by roughly 25 to 30 percent. In race week, the goal is to arrive at the start line feeling fresh, not to squeeze in one final hard effort. Trust the work you've already done.
Elite runners follow the same principle. Why Women Are Built for Better Marathon Pacing touches on how physiological strategy in the final weeks of preparation, including how the body uses fat as fuel at controlled intensities, affects race performance in ways that apply across distances.
Race Day Execution
Start conservatively. The first 3 miles should feel easier than your goal pace warrants. Miles 4 through 9 are where you settle into race effort. Save your push for Miles 10 through 13.1, when other runners are starting to fade and your even pacing pays off.
Wear what you trained in. Check the weather forecast the night before and dress for temperatures 10 to 15 degrees warmer than the actual temperature, since you'll warm up fast. A throwaway layer at the start is worth it if temps are below 40°F.
Eight weeks of structured work gives you a real shot at a strong fall half marathon. The plan is here. Now it's just a matter of executing it one week at a time.