Off-Track Intervals

I couldn't make it to a track today, so I decided to do my intervals around Avery and Jupiter points at lunch. I did the same workout as I did 2 weeks ago: 2x1200s and 3x400s - however, without the track or a GPS, I just did it by time: 2x5 minutes and 3x1:40s. It felt sufficiently difficult. I may try the hill workout tomorrow and then do the long run home later in the week.