Bitan to Xiaogetou (& Pinglin)
Lonely Planet review
This loop ride starts at Bitan, climbs up Provincial Hwy 9 to Xiaogetou (about 15km) and then drops back towards Taipei on the winding 北47 or 北47-1. The latter roads run along steep mountainsides before dropping into Shihting. From there it's a flat ride back to Taipei on the 106乙 via Muzha and the city bike paths.
Instead of turning back at Xiaogetou you can also continue another 11km to Pinglin. It's all downhill just past Helen Coffee and the views over the green-blue Feicui Reservoir are spellbinding.
From Pinglin, riders sometimes continue to Jiaoxi on the coast. This is about 40km further, and consists of a long climb out of Pinglin followed by a long, steep, winding descent to the alluvial plains of Ilan County