But races in general aren´t very sustainable (apart from the huge waste from rehydration stations along the route which hopefully this one will avoid) there are also t-shirts (usually unisex and therefore too big) medals (I know some people like these, but I really don´t need one) goodie bags (leaflets, crisps, energy bars/drinks, etc), and race bibs and chips so I generally avoid them!
Having said that, aswell as the aforementioned motivation of participating, there is also a social aspect so though I don´t intend to do too many, the tactic I usually use to justify participating in the wastefulness is signing up on the day (the way I see it the stuff has already been ordered and will go to waste either way) unfortunately this is usually more expensive than pre-booking (and you don´t get the same motivation to train coming up to it as you know you can always drop out) so not the ideal solution...all the more reason to support this race with reusable cups, that way hopefully the idea will catch on!
Price of signup for 2 people €65.