While it used to be possible to reach Riederalp from Belalp via the Aletsch Glacier, this is no longer possible today due to the receding glacier. The suspension bridge built in 2008 restores this old connection; all in cooperation with Pro Natura, the WWF and the UNESCO World Heritage Swiss Alps Jungfrau-Aletsch.
More information on the hike is available here: Suspension bridge Belalp-Riederalp