45 Minute, 4.6 Mile Treadmill Routine:

Time Speed Incline
0-2 4.0 1%
3-5 6.0 1%
5-8 6.5 1%
8-10 7.0 1%
10-11 7.5 1%
11-35 repeat minutes 5-11 four more times 1%
35-38 6.0 1%
38-40 4.0 1%
subtotal: 4.27 miles
40-45 4.0 5%
Total: 4.6 miles

I love the 3/2/1 minute intervals in this routine. The speed is totally adjustable to your skill/comfort level and it makes the time fly. Give it a whirl!