Boston Marathon logo
BOSTON MARATHON 2023

Keith Carroll

Bib: 27221•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

Start
0:00:00
Race begins
5K· 3.11 mi
32:27
Rank: #24570
Start → 5K
32:27 | 10:27/mi
10K· 6.21 mi
1:02:56
Rank: #23904 (+666)
5K → 10K
30:29 | 9:49/mi
15K· 9.32 mi
1:32:54
Rank: #23532 (+372)
10K → 15K
29:58 | 9:39/mi
20K· 12.43 mi
2:02:33
Rank: #23103 (+429)
15K → 20K
29:39 | 9:33/mi
Half· 13.11 mi
2:08:56
Rank: #23019 (+84)
20K → Half
6:23 | 9:21/mi
25K· 15.53 mi
2:31:58
Rank: #22667 (+352)
Half → 25K
23:02 | 9:30/mi
30K· 18.64 mi
3:02:15
Rank: #22291 (+376)
25K → 30K
30:17 | 9:45/mi
20M
3:15:50
Rank: #22133 (+158)
30K → 20M
13:35 | 10:00/mi
21M
3:26:14
Rank: #21983 (+150)
20M → 21M
10:24 | 10:24/mi
35K· 21.75 mi
3:32:50
Rank: #21856 (+127)
21M → 35K
6:36 | 8:49/mi
23M
3:45:48
Rank: #21800 (+56)
35K → 23M
12:58 | 10:21/mi
24M
3:56:07
Rank: #21795 (+5)
23M → 24M
10:19 | 10:19/mi
40K· 24.85 mi
4:05:05
Rank: #21763 (+32)
24M → 40K
8:58 | 10:29/mi
25.2M
4:08:28
Rank: #21702 (+61)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
4:18:06
Rank: #21640 (+62)
25.2M → Finish
9:38 | 9:27/mi

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 Half⚖️ Balanced
Distance13.11 mi
Time2:08:56
Pace9:50 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time2:09:10
Pace9:51 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0632:2710:2732:27
10:27
-
10K
6.21 mi12:20:351:02:5610:0830:29
9:49
-0:38
15K
9.32 mi12:50:331:32:549:5829:58
9:39
-0:10
20K
12.43 mi13:20:122:02:339:5229:39
9:33
-0:06
Half
13.11 mi13:26:352:08:569:506:23
9:21
-0:12
25K
15.53 mi13:49:372:31:589:4723:02
9:30
+0:09
30K
18.64 mi14:19:543:02:159:4730:17
9:45
+0:15
20M
20.00 mi14:33:293:15:509:4713:35
10:00
+0:15
21M
21.00 mi14:43:533:26:149:4910:24
10:24
+0:24
35K
21.75 mi14:50:293:32:509:476:36
8:49
-1:35
23M
23.00 mi15:03:273:45:489:4912:58
10:21
+1:32
24M
24.00 mi15:13:463:56:079:5010:19
10:19
-0:02
40K
24.85 mi15:22:444:05:059:528:58
10:29
+0:10
25.2M
25.20 mi15:26:074:08:289:523:23
9:49
-0:40
Finish
26.22 mi15:35:454:18:069:519:38
9:27
-0:22

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

8:49 /mi

Average Pace

9:51 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:16

41% of race

Time at Steady Pace

1:51:25

43% of race

Time at Slower Pace

41:25

16% 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 mi11:50:0632:2710:2732:27
10:27
#24570
10K
6.21 mi12:20:351:02:5610:0830:29
9:49
#23904
15K
9.32 mi12:50:331:32:549:5829:58
9:39
#23532
20K
12.43 mi13:20:122:02:339:5229:39
9:33
#23103
Half
13.11 mi13:26:352:08:569:506:23
9:21
#23019
25K
15.53 mi13:49:372:31:589:4723:02
9:30
#22667
30K
18.64 mi14:19:543:02:159:4730:17
9:45
#22291
20M
20.00 mi14:33:293:15:509:4713:35
10:00
#22133
21M
21.00 mi14:43:533:26:149:4910:24
10:24
#21983
35K
21.75 mi14:50:293:32:509:476:36
8:49
#21856
23M
23.00 mi15:03:273:45:489:4912:58
10:21
#21800
24M
24.00 mi15:13:463:56:079:5010:19
10:19
#21795
40K
24.85 mi15:22:444:05:059:528:58
10:29
#21763
25.2M
25.20 mi15:26:074:08:289:523:23
9:49
#21702
Finish
26.22 mi15:35:454:18:069:519:38
9:27
#21640
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24570143481434822642(Top 85%)13469(Top 89%)13469(Top 255%)
10K6.21 mi3.10 mi23904+66614041+30714041+30723292(Top 87%)13765(Top 91%)13765(Top 260%)
15K9.32 mi3.11 mi23532+37213882+15913882+15922642(Top 85%)13469(Top 89%)13469(Top 255%)
20K12.43 mi3.11 mi23103+42913678+20413678+20421685(Top 81%)13048(Top 86%)13048(Top 247%)
Half13.11 mi0.68 mi23019+8413641+3713641+3721676(Top 81%)13039(Top 86%)13039(Top 247%)
25K15.53 mi2.42 mi22667+35213456+18513456+18520833(Top 78%)12632(Top 83%)12632(Top 239%)
30K18.64 mi3.11 mi22291+37613268+18813268+18820282(Top 76%)12335(Top 81%)12335(Top 233%)
20M20.00 mi1.36 mi22133+15813186+8213186+8220467(Top 77%)12333(Top 81%)12333(Top 233%)
21M21.00 mi1.00 mi21983+15013117+6913117+6919272(Top 72%)11755(Top 77%)11755(Top 222%)
35K21.75 mi0.75 mi21856+12713052+6513052+6517049(Top 64%)10741(Top 71%)10741(Top 203%)
23M23.00 mi1.25 mi21800+5613012+4013012+4020956(Top 79%)12438(Top 82%)12438(Top 235%)
24M24.00 mi1.00 mi21795+513001+1113001+1121601(Top 81%)12687(Top 84%)12687(Top 240%)
40K24.85 mi0.85 mi21763+3212969+3212969+3221176(Top 80%)12446(Top 82%)12446(Top 235%)
25.2M25.20 mi0.35 mi21702+6112938+3112938+3116576(Top 62%)10388(Top 68%)10388(Top 197%)
Finish26.22 mi1.02 mi21640+6212905+3312905+3319953(Top 75%)11964(Top 79%)11964(Top 226%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21stories
+97ft-345ft

Overall

22642

Males

13469

M18-39

13469

5K→10K

3.1 - 6.2 mi

Top 87%
×5stories
+79ft-138ft

Overall

23292

Males

13765

M18-39

13765

10K→15K

6.2 - 9.3 mi

Top 85%
×3stories
+67ft-78ft

Overall

22642

Males

13469

M18-39

13469

15K→20K

9.3 - 12.4 mi

Top 81%
×5stories
+106ft-86ft

Overall

21685

Males

13048

M18-39

13048

20K→Half

12.4 - 13.1 mi

Top 81%
×2stories
+19ft-37ft

Overall

21676

Males

13039

M18-39

13039

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

20833

Males

12632

M18-39

12632

25K→30K

15.5 - 18.6 mi

Top 76%
×9stories
+181ft-148ft

Overall

20282

Males

12335

M18-39

12335

30K→20M

18.6 - 20.0 mi

Top 77%
×5stories
+64ft-50ft

Overall

20467

Males

12333

M18-39

12333

20M→21M

20.0 - 21.0 mi

Top 72%
×8stories
+106ft-24ft

Overall

19272

Males

11755

M18-39

11755

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

17049

Males

10741

M18-39

10741

35K→23M

21.8 - 23.0 mi

Top 79%
×5stories
+23ft-63ft

Overall

20956

Males

12438

M18-39

12438

23M→24M

23.0 - 24.0 mi

Top 81%
×6stories
+12ft-82ft

Overall

21601

Males

12687

M18-39

12687

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21176

Males

12446

M18-39

12446

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16576

Males

10388

M18-39

10388

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

19953

Males

11964

M18-39

11964

Passing Analysis

Category:
Athletes Passed
3083
Passed By
153
Net Change
+2930
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24570
5K → 10K68822+666#24570#23904
10K → 15K3819+372#23904#23532
15K → 20K4378+429#23532#23103
20K → Half862+84#23103#23019
Half → 25K3520+352#23019#22667
25K → 30K3826+376#22667#22291
30K → 20M1668+158#22291#22133
20M → 21M1555+150#22133#21983
21M → 35K1281+127#21983#21856
35K → 23M8933+56#21856#21800
23M → 24M3631+5#21800#21795
24M → 40K5321+32#21795#21763
40K → 25.2M621+61#21763#21702
25.2M → Finish686+62#21702#21640
TOTALS3083153+2930
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing