ZRH-Sarnen-Meiringen-Gross Scheidegg-Grindelwald-Interlaken-Lucerne-Zurich

untested, unridden, to try in late August 2013?  Update March 2014: I rode this route with a touring bike and front panniers in late August 2013.  Two days out and two days back.  Stops in Sarnen (out) and Lucerne (back).  Lovely riding but those Alps are steep!  Next time - I will need lower gearing.  The map route I drew doesn't quite show it but you can ride from Meiringen to Grosse Scheidegg to Grindwald on the postal route/national bike route.