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BOSTON MARATHON 2023

Jason Kramer

Bib: 31670•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:07/mi
28:19
↑ 97↓ 3451.5%
10K· 6.21 mi
8:42/mi
55:21
↑ 79↓ 1380.4%
15K· 9.32 mi
8:46/mi
1:22:36
↑ 67↓ 78
20K· 12.43 mi
8:48/mi
1:49:56
↑ 106↓ 860.1%
Half· 13.11 mi
9:20/mi
1:56:18
↑ 19↓ 370.5%
25K· 15.53 mi
9:43/mi
2:19:51
↑ 66↓ 880.2%
30K· 18.64 mi
10:12/mi
2:51:33
↑ 181↓ 1480.2%
20M
10:37/mi
3:05:58
↑ 64↓ 500.2%
21M
11:52/mi
3:17:50
↑ 106↓ 241.6%
35K· 21.75 mi
10:42/mi
3:25:50
↑ 17↓ 861.7%
23M
11:08/mi
3:39:47
↑ 23↓ 630.6%
24M
13:03/mi
3:52:50
↓ 821.3%
40K· 24.85 mi
12:39/mi
4:03:39
↓ 200.3%
25.2M
11:39/mi
4:07:40
↑ 13↓ 160.2%
Finish· 26.22 mi
10:12/mi
4:18:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:18
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:21:46
Pace10:49 /mi
📊Positive Split: 21.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:4428:199:0728:19
9:07
-
10K
6.21 mi12:17:4655:218:5427:02
8:42
-0:25
15K
9.32 mi12:45:011:22:368:5227:15
8:46
+0:04
20K
12.43 mi13:12:211:49:568:5127:20
8:48
+0:02
Half
13.11 mi13:18:431:56:188:526:22
9:20
+0:32
25K
15.53 mi13:42:162:19:519:0023:33
9:43
+0:23
30K
18.64 mi14:13:582:51:339:1231:42
10:12
+0:29
20M
20.00 mi14:28:233:05:589:1814:25
10:37
+0:25
21M
21.00 mi14:40:153:17:509:2511:52
11:52
+1:15
35K
21.75 mi14:48:153:25:509:288:00
10:42
-1:10
23M
23.00 mi15:02:123:39:479:3313:57
11:08
+0:26
24M
24.00 mi15:15:153:52:509:4213:03
13:03
+1:55
40K
24.85 mi15:26:044:03:399:4810:49
12:39
-0:24
25.2M
25.20 mi15:30:054:07:409:504:01
11:39
-1:00
Finish
26.22 mi15:40:294:18:049:5110:24
10:12
-1:27

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:42 /mi

Average Pace

9:51 /mi

Slowest Pace

13:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:18

45% of race

Time at Steady Pace

1:28:04

34% of race

Time at Slower Pace

53:42

21% of race

Average Pace: 9:51 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:50:4428:199:0728:19
9:07
#20914
10K
6.21 mi12:17:4655:218:5427:02
8:42
#20242
15K
9.32 mi12:45:011:22:368:5227:15
8:46
#19928
20K
12.43 mi13:12:211:49:568:5127:20
8:48
#19567
Half
13.11 mi13:18:431:56:188:526:22
9:20
#19719
25K
15.53 mi13:42:162:19:519:0023:33
9:43
#20132
30K
18.64 mi14:13:582:51:339:1231:42
10:12
#20467
20M
20.00 mi14:28:233:05:589:1814:25
10:37
#20612
21M
21.00 mi14:40:153:17:509:2511:52
11:52
#20765
35K
21.75 mi14:48:153:25:509:288:00
10:42
#20846
23M
23.00 mi15:02:123:39:479:3313:57
11:08
#20988
24M
24.00 mi15:15:153:52:509:4213:03
13:03
#21376
40K
24.85 mi15:26:044:03:399:4810:49
12:39
#21620
25.2M
25.20 mi15:30:054:07:409:504:01
11:39
#21622
Finish
26.22 mi15:40:294:18:049:5110:24
10:12
#21637
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi20914125681256819351(Top 73%)12032(Top 79%)12032(Top 586%)
10K6.21 mi3.10 mi20242+67212333+23512333+23519437(Top 73%)12075(Top 80%)12075(Top 588%)
15K9.32 mi3.11 mi19928+31412214+11912214+11919351(Top 73%)12032(Top 79%)12032(Top 586%)
20K12.43 mi3.11 mi19567+36112081+13312081+13318659(Top 70%)11753(Top 77%)11753(Top 573%)
Half13.11 mi0.68 mi19719-15212155-7412155-7421607(Top 81%)13012(Top 86%)13012(Top 634%)
25K15.53 mi2.42 mi20132-41312333-17812333-17821497(Top 81%)12920(Top 85%)12920(Top 630%)
30K18.64 mi3.11 mi20467-33512455-12212455-12221530(Top 81%)12863(Top 85%)12863(Top 627%)
20M20.00 mi1.36 mi20612-14512507-5212507-5221960(Top 82%)12983(Top 86%)12983(Top 633%)
21M21.00 mi1.00 mi20765-15312575-6812575-6822516(Top 85%)13206(Top 87%)13206(Top 644%)
35K21.75 mi0.75 mi20846-8112590-1512590-1522732(Top 85%)13268(Top 87%)13268(Top 647%)
23M23.00 mi1.25 mi20988-14212635-4512635-4522616(Top 85%)13205(Top 87%)13205(Top 644%)
24M24.00 mi1.00 mi21376-38812810-17512810-17525503(Top 96%)14549(Top 96%)14549(Top 709%)
40K24.85 mi0.85 mi21620-24412910-10012910-10024598(Top 92%)14095(Top 93%)14095(Top 687%)
25.2M25.20 mi0.35 mi21622-212902+812902+821831(Top 82%)12774(Top 84%)12774(Top 623%)
Finish26.22 mi1.02 mi21637-1512904-212904-222297(Top 84%)12998(Top 86%)12998(Top 633%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21story building
+97ft-345ft

Overall

19351

Males

12032

M50-54

12032

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19437

Males

12075

M50-54

12075

10K→15K

6.2 - 9.3 mi

Top 73%
×3story building
+67ft-78ft

Overall

19351

Males

12032

M50-54

12032

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

18659

Males

11753

M50-54

11753

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21607

Males

13012

M50-54

13012

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

21497

Males

12920

M50-54

12920

25K→30K

15.5 - 18.6 mi

Top 81%
×9story building
+181ft-148ft

Overall

21530

Males

12863

M50-54

12863

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

21960

Males

12983

M50-54

12983

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

22516

Males

13206

M50-54

13206

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22732

Males

13268

M50-54

13268

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

22616

Males

13205

M50-54

13205

23M→24M

23.0 - 24.0 mi

Top 96%
×6story building
+12ft-82ft

Overall

25503

Males

14549

M50-54

14549

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24598

Males

14095

M50-54

14095

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21831

Males

12774

M50-54

12774

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

22297

Males

12998

M50-54

12998

Passing Analysis

Category:
Athletes Passed
1856
Passed By
2579
Net Change
-723
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20914
5K → 10K775103+672#20914#20242
10K → 15K39379+314#20242#19928
15K → 20K39635+361#19928#19567
20K → Half2154-152#19567#19719
Half → 25K37450-413#19719#20132
25K → 30K66401-335#20132#20467
30K → 20M35180-145#20467#20612
20M → 21M28181-153#20612#20765
21M → 35K21102-81#20765#20846
35K → 23M41183-142#20846#20988
23M → 24M4392-388#20988#21376
24M → 40K3247-244#21376#21620
40K → 25.2M2527-2#21620#21622
25.2M → Finish3045-15#21622#21637
TOTALS18562579-723
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing