Trails and mud they work great, climbing hill I give it a 5 out of 10. If your gonna be climbing anything large, u better get one hell of a run at it, and if u miss a gear, your in trouble. I had my 2001 Warrior (all stock mind you) for 1 month, and I personally was not impressed with it on hills, all my buddies of course have rappy 660's, trx 450, or ltz 400, if u ever ride one of them you will not want to get back on your warrior, it will feel like a tank. So rather than invest 2000 bucks in my warrior to attempt to make it compete I traded it and with an additional 2000 picked up an 03 rappy 660. U will want more than the warrior soon, I am sure.

Just my opinion though

i know bad o4 warrior had a warrior that screams, but with that i am sure came lots of moola

 

I got an 01 warrior completely stock and thats the types of riding I do. Its a whole lot of fun on tight trails, but even more fun in the mud, especially when my girl friend is on the back. Some hills can become an obstacle depending on how rutted out they are. But that makes for more of a challenge.

 

my budy has a warrior with some mods and the thing impresses the hell out of me on the trails.