A free half marathon training plan should do more than hand you a generic calendar—it should adapt to your current fitness, your goal time, and the specific race you're preparing for. That's exactly what the FE26 half marathon training plan builder does, and it's completely free to preview. Enter your race and goal above and you'll get a personalized, phased schedule in under a minute.
The half marathon is the sweet spot of distance running—long enough to demand real endurance training, short enough that speed matters significantly. At 13.1 miles, you're running at a pace noticeably faster than marathon effort, which means lactate threshold training becomes a cornerstone of preparation.
A typical half marathon training plan spans 10–14 weeks. The base phase builds aerobic fitness through easy mileage and progressive long runs up to 10–12 miles. The build phase introduces tempo runs at half marathon pace, cruise intervals, and progressive runs. Peak weeks combine race-pace long runs with shorter, faster interval sessions. The taper is shorter than a marathon—usually 7–10 days.
Whether you want a beginner half marathon training plan, a 12-week schedule, or a 16-week program with a bigger base, the structure is the same—only the volume and progression change. Beginners should prioritize consistency and finishing their long runs feeling strong; experienced runners can add a second quality session and push peak mileage higher.
The half marathon rewards runners who can sustain a comfortably hard effort. Training should include at least one weekly tempo or threshold session, a long run, and enough easy volume to support recovery. Cross-training with cycling or swimming can supplement mileage without the impact stress, which is especially useful if you're training on 3–4 days per week.
Pacing strategy is critical: going out 10–15 seconds per mile too fast in the first 5K often leads to a significant slowdown in the final 5K. Practice even pacing or slight negative splits in training, and rehearse your race-day fueling on your longer runs so nothing is a surprise on race morning.