Next week - I'll aim to run three times and I'll keep the walking / running ratios the same:
* Walk briskly up to the bridge as a warm up (about 16 minutes)
* Run 3 minutes, walk 1 minute along and down the mountain to Albisguetli
* Take off snow heels!
* Run 3 minutes, walk 1 minute back along the concrete footpath to Triemli
If that goes well next week, I'll start doing 3.5 minutes to 1 minute, and I may even consider shortening my warm up - but this would mean running uphill :-(