50KBeginner16 Weeks

Your First 50K

From half marathon fitness to ultramarathoner in 16 weeks. This plan builds mileage gradually with nutrition practice and gear testing built in.

Week-by-Week Breakdown

Week	Focus	Long Run	Weekly Miles	Notes
1	Build Base	10 mi	25-30	Easy pace. Get comfortable with time on feet.
2	Build Base	11 mi	27-32	Add 1 mile to long run. Practice hydration.
3	Build Base	13 mi	30-35	First back-to-back weekend: 13 Sat + 6 Sun.
4	Recovery	8 mi	20-25	Cutback week. Let your body adapt.
5	Build Endurance	14 mi	32-37	Start practicing race nutrition on long runs.
6	Build Endurance	16 mi	35-40	Back-to-back: 16 Sat + 8 Sun.
7	Build Endurance	17 mi	37-42	Test your race shoes and vest on this one.
8	Recovery	10 mi	22-27	Cutback week. How's your nutrition strategy feeling?
9	Peak Building	18 mi	38-43	Biggest back-to-back: 18 Sat + 10 Sun.
10	Peak Building	20 mi	40-45	Your longest run. Simulate race conditions.
11	Peak Building	22 mi	42-47	Final big effort. You're ready after this.
12	Recovery	12 mi	25-30	Cutback week. Trust the training.
13	Sharpening	18 mi	35-40	Last long run with race nutrition dress rehearsal.
14	Taper	14 mi	28-33	Mileage drops. You may feel restless — that's normal.
15	Taper	10 mi	20-25	Easy running only. Focus on sleep and recovery.
16	Race Week	50K Race!	Race	You've done the work. Go get that finish line.

80% of your running should be at conversational pace. If you can't talk in full sentences, slow down. Ultra running is about endurance, not speed.

Running long on Saturday then medium on Sunday teaches your body to run on tired legs — exactly what you'll face in a 50K.

Every long run is a chance to test your fueling strategy. By race day, eating while running should feel automatic.

Recovery weeks aren't wasted weeks. Your body gets stronger during rest, not during the run itself.

Check out our curated First 50K Kit — everything you need, nothing you don't.

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