We present preliminary results of a photometric investigation on IC10 using F555W and F814W data collected with WFPC2@HST covering two different regions. We provide a new estimate of both distance and reddening by adopting the Tip of the Red Giant Branch (TRGB). We find that the RGB stars in the two regions are located at the same distance, but present different reddening values. In particular, we find DM_0 = 24.75 ± 0.1 and E(B-V) = 0.44 ± 0.14 for the outer region, and E(B-V) = 0.60 ± 0.14 for the central fields. Moreover we show that stellar isochrones at fixed metal content, distance and reddening account for both Main Sequence (MS) and evolved stellar components.