Yes, it is unreasonable. Quoting from https://en.wikipedia.org/wiki/Walking https://en.wikipedia.org/wiki/Walking : > Specific studies have found pedestrian wa

Yes, it is unreasonable. Quoting from https://en.wikipedia.org/wiki/Walking https://en.wikipedia.org/wiki/Walking : > Specific studies have found pedestrian walking speeds ranging from 4.51 kilometres per hour (2.80 mph) to 4.75 kilometres per hour (2.95 mph) for older individuals and from 5.32 kilometres per hour (3.31 mph) to 5.43 kilometres per hour (3.37 mph) for younger individuals; a brisk walking speed can be around 6.5 kilometres per hour (4.0 mph). Champion racewalkers can average more than 14 kilometres per hour (8.7 mph) over a distance of 20 kilometres (12 mi). ... > Power walking or speed walking is the act of walking with a speed at the upper end of the natural range for walking gait, typically 7 to 9 km/h (4.5 to 5.5 mph). Quoting from https://en.wikipedia.org/wiki/Preferred_walking_speed https://en.wikipedia.org/wiki/Preferred_walking_speed : > Many people tend to walk at about 1.4 m/s (5.0 km/h; 3.1 mph). Although many people are capable of walking at speeds upwards of 2.5 m/s (9.0 km/h; 5.6 mph), especially for short distances, they typically choose not to. Individuals find slower or faster speeds uncomfortable. These all indicate that walking 6 miles in an hour is exceptional. FWIW, a 10 minute mile is faster than the 11:47 per mile average pace from the 5K run data set at http://www.pace-calculator.com/5k-pace-comparison.php http://www.pace-calculator.com/5k-pace-comparison.php . The average pace for males 25 - 29 is 10 minutes / mile.