Re: derry marathon miles 1-6 flat, 6-10 uphill, 10-15 flat/downhill 16-18 hill, 18-25 flat, at mile 25 there is a hill not long but it will be a tester once you get over it its grand downhill then finish line, hope this helps grainne http://m.walkjogrun.net/jsroute.cfm?rid=64AA9110-A2BC-7C78-44D5930F15F3FDFB try this link http://thewalledcitymarathon.com/race-route/