Boston Marathon logo
BOSTON MARATHON 2023

Michael Kerr

Bib: 30586•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
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
10:18/mi
31:59
↑ 97↓ 3451.5%
10K· 6.21 mi
10:23/mi
1:04:14
↑ 79↓ 1380.4%
15K· 9.32 mi
10:04/mi
1:35:32
↑ 67↓ 78
20K· 12.43 mi
10:12/mi
2:07:12
↑ 106↓ 860.1%
Half· 13.11 mi
10:26/mi
2:14:19
↑ 19↓ 370.5%
25K· 15.53 mi
11:36/mi
2:42:27
↑ 66↓ 880.2%
30K· 18.64 mi
11:17/mi
3:17:29
↑ 181↓ 1480.2%
20M
10:57/mi
3:32:22
↑ 64↓ 500.2%
21M
11:53/mi
3:44:15
↑ 106↓ 241.6%
35K· 21.75 mi
11:43/mi
3:53:01
↑ 17↓ 861.7%
23M
11:07/mi
4:06:56
↑ 23↓ 630.6%
24M
10:27/mi
4:17:23
↓ 821.3%
40K· 24.85 mi
11:05/mi
4:26:52
↓ 200.3%
25.2M
12:57/mi
4:31:20
↑ 13↓ 160.2%
Finish· 26.22 mi
8:06/mi
4:39:35
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:14:19
Pace10:15 /mi
2nd Half
Distance13.11 mi
Time2:25:16
Pace11:05 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:3631:5910:1831:59
10:18
-
10K
6.21 mi12:26:511:04:1410:2032:15
10:23
+0:05
15K
9.32 mi12:58:091:35:3210:1531:18
10:04
-0:19
20K
12.43 mi13:29:492:07:1210:1431:40
10:12
+0:08
Half
13.11 mi13:36:562:14:1910:157:07
10:26
+0:14
25K
15.53 mi14:05:042:42:2710:2728:08
11:36
+1:10
30K
18.64 mi14:40:063:17:2910:3635:02
11:17
-0:19
20M
20.00 mi14:54:593:32:2210:3714:53
10:57
-0:20
21M
21.00 mi15:06:523:44:1510:4111:53
11:53
+0:56
35K
21.75 mi15:15:383:53:0110:438:46
11:43
-0:10
23M
23.00 mi15:29:334:06:5610:4413:55
11:07
-0:36
24M
24.00 mi15:40:004:17:2310:4310:27
10:27
-0:40
40K
24.85 mi15:49:294:26:5210:449:29
11:05
+0:38
25.2M
25.20 mi15:53:574:31:2010:464:28
12:57
+1:52
Finish
26.22 mi16:02:124:39:3510:408:15
8:06
-4:51

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

8:06 /mi

Average Pace

10:40 /mi

Slowest Pace

12:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:27

48% of race

Time at Steady Pace

1:30:53

33% of race

Time at Slower Pace

53:15

19% of race

Average Pace: 10:40 /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 mi11:54:3631:5910:1831:59
10:18
#24205
10K
6.21 mi12:26:511:04:1410:2032:15
10:23
#24349
15K
9.32 mi12:58:091:35:3210:1531:18
10:04
#24115
20K
12.43 mi13:29:492:07:1210:1431:40
10:12
#23881
Half
13.11 mi13:36:562:14:1910:157:07
10:26
#23896
25K
15.53 mi14:05:042:42:2710:2728:08
11:36
#24090
30K
18.64 mi14:40:063:17:2910:3635:02
11:17
#23983
20M
20.00 mi14:54:593:32:2210:3714:53
10:57
#23887
21M
21.00 mi15:06:523:44:1510:4111:53
11:53
#23822
35K
21.75 mi15:15:383:53:0110:438:46
11:43
#23853
23M
23.00 mi15:29:334:06:5610:4413:55
11:07
#23794
24M
24.00 mi15:40:004:17:2310:4310:27
10:27
#23729
40K
24.85 mi15:49:294:26:5210:449:29
11:05
#23686
25.2M
25.20 mi15:53:574:31:2010:464:28
12:57
#23698
Finish
26.22 mi16:02:124:39:3510:408:15
8:06
#23501
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24205141921419223648(Top 89%)13931(Top 92%)13931(Top 264%)
10K6.21 mi3.10 mi24349-14414251-5914251-5924452(Top 92%)14289(Top 94%)14289(Top 270%)
15K9.32 mi3.11 mi24115+23414141+11014141+11023648(Top 89%)13931(Top 92%)13931(Top 264%)
20K12.43 mi3.11 mi23881+23414037+10414037+10423274(Top 87%)13753(Top 91%)13753(Top 260%)
Half13.11 mi0.68 mi23896-1514045-814045-824063(Top 90%)14094(Top 93%)14094(Top 267%)
25K15.53 mi2.42 mi24090-19414111-6614111-6624795(Top 93%)14375(Top 95%)14375(Top 272%)
30K18.64 mi3.11 mi23983+10714055+5614055+5623533(Top 88%)13761(Top 91%)13761(Top 260%)
20M20.00 mi1.36 mi23887+9614005+5014005+5022623(Top 85%)13288(Top 88%)13288(Top 251%)
21M21.00 mi1.00 mi23822+6513963+4213963+4222554(Top 85%)13225(Top 87%)13225(Top 250%)
35K21.75 mi0.75 mi23853-3113968-513968-524371(Top 92%)14027(Top 92%)14027(Top 265%)
23M23.00 mi1.25 mi23794+5913935+3313935+3322569(Top 85%)13186(Top 87%)13186(Top 249%)
24M24.00 mi1.00 mi23729+6513892+4313892+4321914(Top 82%)12836(Top 85%)12836(Top 243%)
40K24.85 mi0.85 mi23686+4313867+2513867+2522534(Top 85%)13102(Top 86%)13102(Top 248%)
25.2M25.20 mi0.35 mi23698-1213873-613873-623894(Top 90%)13739(Top 91%)13739(Top 260%)
Finish26.22 mi1.02 mi23501+19713770+10313770+10312746(Top 48%)8661(Top 57%)8661(Top 164%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

23648

Males

13931

M18-39

13931

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

24452

Males

14289

M18-39

14289

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

23648

Males

13931

M18-39

13931

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

23274

Males

13753

M18-39

13753

20K→Half

12.4 - 13.1 mi

Top 90%
×2story building
+19ft-37ft

Overall

24063

Males

14094

M18-39

14094

Half→25K

13.1 - 15.5 mi

Top 93%
×4story building
+66ft-88ft

Overall

24795

Males

14375

M18-39

14375

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23533

Males

13761

M18-39

13761

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22623

Males

13288

M18-39

13288

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

22554

Males

13225

M18-39

13225

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24371

Males

14027

M18-39

14027

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

22569

Males

13186

M18-39

13186

23M→24M

23.0 - 24.0 mi

Top 82%
×6story building
+12ft-82ft

Overall

21914

Males

12836

M18-39

12836

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22534

Males

13102

M18-39

13102

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

23894

Males

13739

M18-39

13739

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12746

Males

8661

M18-39

8661

Passing Analysis

Category:
Athletes Passed
1495
Passed By
791
Net Change
+704
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24205
5K → 10K129273-144#24205#24349
10K → 15K28147+234#24349#24115
15K → 20K26026+234#24115#23881
20K → Half2136-15#23881#23896
Half → 25K37231-194#23896#24090
25K → 30K15245+107#24090#23983
30K → 20M1048+96#23983#23887
20M → 21M8823+65#23887#23822
21M → 35K1445-31#23822#23853
35K → 23M7920+59#23853#23794
23M → 24M705+65#23794#23729
24M → 40K5411+43#23729#23686
40K → 25.2M921-12#23686#23698
25.2M → Finish1970+197#23698#23501
TOTALS1495791+704
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing