(17.4km) 九龍塘港鐵站F出口集合起步, 穿根德道出歌和老街. 過馬路左走一探畢架山舊火車隧道. 少走畢架山道中途左入林走藍管道出龍翔道. 上天橋過馬路後直入龍欣道上至豐力樓後畢架山中配水庫旁等山路上一遊北子午線標. 續畢架山橫腰古道跨畢架山沖溝續畢架山古道上至麥徑5段回歸亭. 回歸徑落少少便右接八仙徑經八仙廟落獅子山公園燒烤場大休. 休後穿翠竹花園, 接護土牆晨運路往廢石礦場. 出沙田坳道左走, 接札山道行至象山西北坑旁晨運地下午茶. 茶後續札山道落斜至一涼亭位接涼亭後小徑, 中途走左路落豐盛街, 往牛池灣公園洗白白. 後接彩鳳徑落清水灣道經牛池灣抽水站, 穿牛池灣街市往龍池徑新志興燒鵝大王晚飯 20200211
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九龍塘港鐵站F出口集合起步 DSC03778
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穿根德道 DSC03779
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出歌和老街, 過馬路左走, 中途往右下望 DSC03779a
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有乜睇? DSC03780
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原來是畢架山舊火車隧道 DSC03782
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往前少少有路可落隧道口 DSC03786
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走鐵梯落隧道口 DSC03786a
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第一條筆架山隧道於1906年開始建造，至1910年啟用，全長2.4公里，闊5.2米 DSC03787
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現時，舊隧道內的行車軌道已被拆除，並加建輸送管供香港中華煤氣公司用作輸送煤氣 DSC03791
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爬番鐵梯回上馬路邊 DSC03798
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或上鐵梯中途轉右往隧道頂去 DSC03799
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馬路邊落隧道口的鐵梯口 DSC03800
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回歌和老街回走至畢架山道, 在畢架山道口前少少便轉左入林 DSC03801
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回望馬路位 DSC03803
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穿林上 DSC03805
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隨後沿藍管邊走 DSC03808
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中途竟見有測量柱 DSC03813
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