Last week, after a break of 20 years, I started running again. In the past I had a lot of knee problems so I had all but given up on impact exercises. This winter me moved to the Seattle area and the wealth of trails near my home finally inspired me to give it another try. There's a small lake at the end of my street that has a nice 1.5 mile wooded trail around it. For now I'm just doing one circuit of that trail every other day to see how my knees hold up. If I survive for a month then I'll start adding distance. Since I need some sort of goal to strive for I've been timing my 1.5 mile run and I want to find out what a reasonable target time for that distance would be. It's a dirt trail with lots of medium-sized hills and right now my best time is 12:23 which to me seems slow. I realize that running cross-country takes longer than on a flat track but I really have no clue what I should be aiming for here. Any thoughts?