Your Marathon Journey Starts Here
Training for a marathon is one of the most rewarding challenges an endurance athlete can undertake. This 16-week plan is designed for beginners who can currently run 3-4 miles comfortably. We'll build your endurance gradually, peaking at weeks 12-13 before tapering into race day.
Phase 1: Base Building (Weeks 1-4)
The foundation of marathon training is building an aerobic base. During these first four weeks, focus on consistency over speed. Your easy pace should feel conversational — if you can't hold a conversation, slow down.
- Week 1: 3 runs (3, 3, 5 miles) + 1 cross-train. Total: ~15 miles
- Week 2: 3 runs (3, 4, 6 miles) + 1 cross-train. Total: ~17 miles
- Week 3: 4 runs (3, 3, 4, 7 miles) + 1 cross-train. Total: ~21 miles
- Week 4: 3 runs (3, 4, 5 miles) — recovery week. Total: ~16 miles
The 10% rule is your friend: never increase weekly mileage by more than 10% from week to week. Notice how Week 4 is a step-back week — these recovery weeks are critical for adaptation.
Phase 2: Building Endurance (Weeks 5-8)
Now we start extending those long runs. This is where you'll build the endurance that carries you through 26.2 miles.
- Week 5: 4 runs (4, 4, 5, 8 miles). Total: ~25 miles
- Week 6: 4 runs (4, 5, 5, 10 miles). Total: ~28 miles
- Week 7: 4 runs (4, 5, 5, 12 miles). Total: ~30 miles
- Week 8: 3 runs (4, 5, 8 miles) — recovery week. Total: ~21 miles
Your Saturday long run is the most important workout of the week. Run it 60-90 seconds per mile slower than your goal marathon pace. Practice your race-day nutrition starting at Week 6 — take a gel or chews every 45 minutes on long runs over 10 miles.
Phase 3: Peak Training (Weeks 9-13)
This is where the magic happens. Your longest runs will reach 18-20 miles, and you'll introduce marathon-pace segments.
- Week 9: 4 runs (5, 5, 6, 14 miles). Total: ~34 miles
- Week 10: 4 runs (5, 6, 6, 16 miles). Total: ~37 miles
- Week 11: 4 runs (5, 6, 5, 18 miles). Total: ~38 miles
- Week 12: 4 runs (5, 5, 6, 20 miles). Total: ~40 miles
- Week 13: 4 runs (5, 5, 5, 16 miles). Total: ~35 miles
For your 18 and 20-mile runs, include 4-6 miles at marathon pace in the middle. This teaches your body to run on tired legs at race pace — the most race-specific training you can do.
Phase 4: Taper (Weeks 14-16)
The taper is where fitness becomes performance. Reduce volume by 40-60% while maintaining intensity in shorter workouts.
- Week 14: 3 runs (4, 5, 12 miles). Total: ~25 miles
- Week 15: 3 runs (4, 4, 8 miles). Total: ~20 miles
- Week 16 (Race Week): 2 easy runs (3, 2 miles) + Marathon! Total: ~31 miles
You may feel antsy during taper — that's normal. Trust your training. Your body is absorbing 16 weeks of work.
Race Day Tips
- Start slow: Your first mile should feel almost too easy. The marathon is won in the second half.
- Fuel early: Take your first gel at mile 5-6, then every 4-5 miles after.
- Walk the aid stations: It's faster to walk, drink properly, and resume running than to choke on fluids.
- Miles 18-22 will be hard: This is "the wall." It's temporary. Keep moving forward.
- Smile at mile 24: You're about to become a marathoner.
Ready to find your first marathon? Browse upcoming marathon events on EnduranceFinder and start your journey today.
