Alex Ghitza and I climb Katahdin.11mi, start 06:25, finish 16:50. up on Helon Taylor trail to Pamola Peak, hitting Chimney Peak, through the Knife Edge; up to Baxter Peak, then down Saddle Trail to Northwest Basin trail to Hamlin Peak (completely uncrowded, unlike Baxter Peak; hit two other people), then down Hamlin Ridge (encountered one hiker) to N Basin and through to Roaring Brook and down the Chimney Pond trail. Generally bouldery (except Saddle Trail). Spectacular views; totally blue sky. Excellent day for hiking (unlike Saturday).