How long does it take to swim 2.4 miles?

2.4 miles or 3,800 meters is a long time to be swimming. The average age-group swimmer takes roughly eighty minutes to swim this distance without stopping. And of course you're going to follow that with a bike ride and full marathon run.
A.

How long does it take Michael Phelps to swim a mile?

According to ESPN, Michael Phelps' swimming speed capped off at about 6 miles per hour in 2010. If you're thinking 6 miles per hour sounds less than impressive, imagine trying to swim across a 6 mile-wide body of water in just an hour.
• How fast a human can swim?

Although the researchers noted that the average sprinting speeds among swimmers is 1.64 meters per second, or approximately 3.7 mph, humans' ability to sustain such speeds over long distances is limited.
• How fast is the bolt?

Limits of speed. The record was 44.72 km/h (27.8 mph), seen during the final 100 meters sprint of the World Championships in Berlin on 16 August 2009 by Usain Bolt. (Bolt's average speed over the course of this race was 37.58 km/h or 23.35 mph.) Maximum human sprint speed is strikingly slower than that of many animals.
• How fast is a mako shark?

The shortfin mako may be fastest shark on earth. Its muscles and body design have evolved over 400 million years to reach top speeds of 45 to over 60 miles per hour.

Updated: 2nd October 2019