Walking a 10K at 28 weeks?

chillyupnorth

I normally walk about 3-4 miles on a regular basis - about 3x per week with shorter walks or other exercise on other days, and I am currently 22 weeks. I have walked 4 miIes per day, most days, for several years. Is it too much of a stretch to plan on walking a 10K (about 6 miles) with a friend around week 28? I haven't had any complications with my pregnancy so far, and if there is anything that would complicate it between now and then I would of course take that into consideration. Also, the course I would be walking is has regular aid stations, we're not going for time, and I could stop at any point and tell my husband to come pick me up. What do you think?