Hiking uphill i get pain in my left inner thigh. downhill is fine. after the hike, lifting my left leg up, i feel sharp pain in my inner thigh. help!

Sounds muscular: Your description sounds like a strain of a muscle that travels from your pelvic bone to your knee, and whose action is involved with raising your leg. It may be a muscle strain of one of the left leg's quadriceps muscle.

Hip Pain: Concern would be hip etiology. When you go up hills you go into increased flexion at the femoral acetabular joint (hip joint). Many things can cause this including cartilage issues or osteoarthritis, labral changes, or femoral acetabular impingement. A clinical exam and simple x-ray may provide quite a bit of information.