2km WU @ Easy Pace (RPE: 3)
6km @ Marathon Pace (RPE: 4)
1km @ Easy Pace (RPE: 3)
5km @ Marathon Pace (RPE: 5)
1km @ Easy Pace (RPE: 3)
4km @ Marathon Pace (RPE: 6)
1km @ Easy Pace (RPE: 3)
3km @ Marathon Pace (RPE: 7)
1km @ Easy Pace (RPE: 3)
2km @ Marathon Pace (RPE: 7)
1km @ Easy Pace (RPE: 3)
1km @ Marathon Pace (RPE: 7)
2km CD @ Easy Pace (RPE: 3)
Looks like a beast on paper but 21km at marathon pace at this stage of the plan should be achievable. Keep those float kms super easy. Go smash it!