Trekking/hiking in Chiang Mai

I'd love to go on a really nice hike or trek package in Chiang Mai. Are the elephant rides included in these treks usually humane? I've found some with varying prices, there are some that charge $100 a day, and then some that are only 1000 baht/$30 a day. Does anyone have suggestions for a good company to book? I'm young, fairly fit, and I wouldn't mind a pretty strenuous hike (although I don't have a lot of experience, so I don't want anything that requires too much skill or experience). I'm looking for a one-day trek hopefully, since I have already paid for my accommodation in full.

Asked by klw624 via WorldNomads.com