Taking the above into account I was surprised to learn that, as of January, the Danda Forest Road (丹大林道) was open to both hikers and cyclists. This is a tough ride with only the central and southern cross-island highways coming close in terms of extreme ascent. Higher up on Danda Forest Trail you ride through magnificent forest. DAY TWOFour riders traveling up the Danda Forest Road with bikes fully loaded with camping. Police permits are legally required for trips along the Danda Forest Road.

Source: Taipei Times March 10, 2021 15:56 UTC