Which is harder triathlon or marathon?

Related questions

1. Can I run a marathon without training?
2. When should your longest run be before a marathon?
3. What is a good Ironman 70.3 time?
4. What is a iron man marathon?
5. How long to train for an Ironman from scratch?
6. How much does it cost to do an Ironman?
7. How long should it take to swim a mile?
8. How many laps in a pool is a good workout?
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10. How many hours a day should I train?

Tags

1. #ironman
2. #going
3. #about
4. #easier
5. #triathlon
6. #harder
7. #intensity
8. #marathon
9. #cannot
10. #difficult