Running

My calves (soleus to be exact) felt very tight after Sunday, and slightly brittle if that makes sense?

As in, I didn't want to risk running on them and tearing one/both as I did at roughly this time last year.

So I am back to doing 300 calf raises/leg/day to strengthen them up.

These are surprisingly hard work if you do them without holding onto anything.

Can you include a lot of steps in your weekly schedual?
Long steep hill climbs?

Dalsnibbe is going to involve running lent forward by 8% for hours. So your calfs are going to be streatched the whole time.

I'm have two worries. My suspect hip-hamstring connection when climbing on the bike so long (what popped last time). Then my calfs exploding, on the run, in a cloud of sulphur and lava.