To run a half marathon in 2:30, hold 11'27" per mile, i.e. 5.24 mph (7'07"/km). At that pace: 5K in 35'33", 10K in 1h11'06", half marathon in 2h30'00", marathon in 5h00'00".
Half marathon in 2:30: 11'27"/mile
1 track lap = 2'50"6
1 track lap = 2'50"6
To run a half marathon in 2:30, hold 11'27" per mile, i.e. 5.24 mph (7'07"/km). At that pace: 5K in 35'33", 10K in 1h11'06", half marathon in 2h30'00", marathon in 5h00'00".