1.5 km walk when 35 weeks pregnant

I do a 'memory walk' to raise money for Alzhiemer's Society every year, in memory of my Grandma. There's a 1.5 km or a 7 km option, we usually do the 7 km (which is a pretty tiring trek). As I will be 35 weeks pregnant by then, I'm signing up for the shorter one this year. But is it safe to do a 1.5 km walk at that point in pregnancy? It's not really that far (less than a mile), but it's a little bit uphill and I imagine I'll be waddling by then (first pregnancy so I don't know how it feels). Would you do it? Thanks :)