Another 3+ hour ride

Weather was fantastic! Over 50 degrees. Did my first 90 minutes on the fixed gear, with my son, in his trailer, being towed behind me. I think overall that's about 80 pounds I'm pulling along. Felt so overgeared, I could barely get the cadence to reach 60.. After depositing my boy at home I did another 90 minutes without the trailer, and it felt like I had wings compared to the first 90 minutes.. Got home pretty late too- it was pitch black outside.. and those ice patches on the bike path are hard to see in the dark!
Next weekend: 4 hours on Saturday and 4 hours on Sunday. If it's very cold out I think I may stop home at half time for a quick warm-up and change of clothing.