Boston Marathon logo
BOSTON MARATHON 2023

Jacob Coffey

Bib: 29532•M

ME

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
32:57
Rank: #24960
Start → 5K
32:57 | 10:36/mi
10K· 6.21 mi
1:03:30
Rank: #24106 (+854)
5K → 10K
30:33 | 9:50/mi
15K· 9.32 mi
1:36:17
Rank: #24290 (-184)
10K → 15K
32:47 | 10:33/mi
20K· 12.43 mi
2:11:24
Rank: #24537 (-247)
15K → 20K
35:07 | 11:18/mi
Half· 13.11 mi
2:18:44
Rank: #24550 (-13)
20K → Half
7:20 | 10:45/mi
25K· 15.53 mi
2:46:23
Rank: #24575 (-25)
Half → 25K
27:39 | 11:24/mi
30K· 18.64 mi
3:25:14
Rank: #24688 (-113)
25K → 30K
38:51 | 12:30/mi
20M
3:43:09
Rank: #24785 (-97)
30K → 20M
17:55 | 13:11/mi
21M
3:57:21
Rank: #24823 (-38)
20M → 21M
14:12 | 14:12/mi
35K· 21.75 mi
4:07:06
Rank: #24883 (-60)
21M → 35K
9:45 | 13:02/mi
23M
4:24:28
Rank: #24992 (-109)
35K → 23M
17:22 | 13:52/mi
24M
4:38:01
Rank: #25065 (-73)
23M → 24M
13:33 | 13:33/mi
40K· 24.85 mi
4:49:25
Rank: #25090 (-25)
24M → 40K
11:24 | 13:20/mi
25.2M
4:54:29
Rank: #25097 (-7)
40K → 25.2M
5:04 | 14:42/mi
Finish· 26.22 mi
5:06:47
Rank: #25115 (-18)
25.2M → Finish
12:18 | 12:04/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 HalfFaster
Distance13.11 mi
Time2:18:44
Pace10:35 /mi
2nd Half
Distance13.11 mi
Time2:48:03
Pace12:49 /mi
📊Positive Split: 21.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:1132:5710:3632:57
10:36
-
10K
6.21 mi12:21:441:03:3010:1330:33
9:50
-0:46
15K
9.32 mi12:54:311:36:1710:2032:47
10:33
+0:43
20K
12.43 mi13:29:382:11:2410:3435:07
11:18
+0:45
Half
13.11 mi13:36:582:18:4410:357:20
10:45
-0:33
25K
15.53 mi14:04:372:46:2310:4327:39
11:24
+0:39
30K
18.64 mi14:43:283:25:1411:0138:51
12:30
+1:06
20M
20.00 mi15:01:233:43:0911:0917:55
13:11
+0:41
21M
21.00 mi15:15:353:57:2111:1814:12
14:12
+1:01
35K
21.75 mi15:25:204:07:0611:229:45
13:02
-1:10
23M
23.00 mi15:42:424:24:2811:3017:22
13:52
+0:50
24M
24.00 mi15:56:154:38:0111:3513:33
13:33
-0:19
40K
24.85 mi16:07:394:49:2511:3911:24
13:20
-0:13
25.2M
25.20 mi16:12:434:54:2911:415:04
14:42
+1:22
Finish
26.22 mi16:25:015:06:4711:4312:18
12:04
-2:38

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

9:50 /mi

Average Pace

11:43 /mi

Slowest Pace

14:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:23

54% of race

Time at Steady Pace

1:18:49

26% of race

Time at Slower Pace

1:01:35

20% of race

Average Pace: 11:42 /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 mi11:51:1132:5710:3632:57
10:36
#24960
10K
6.21 mi12:21:441:03:3010:1330:33
9:50
#24106
15K
9.32 mi12:54:311:36:1710:2032:47
10:33
#24290
20K
12.43 mi13:29:382:11:2410:3435:07
11:18
#24537
Half
13.11 mi13:36:582:18:4410:357:20
10:45
#24550
25K
15.53 mi14:04:372:46:2310:4327:39
11:24
#24575
30K
18.64 mi14:43:283:25:1411:0138:51
12:30
#24688
20M
20.00 mi15:01:233:43:0911:0917:55
13:11
#24785
21M
21.00 mi15:15:353:57:2111:1814:12
14:12
#24823
35K
21.75 mi15:25:204:07:0611:229:45
13:02
#24883
23M
23.00 mi15:42:424:24:2811:3017:22
13:52
#24992
24M
24.00 mi15:56:154:38:0111:3513:33
13:33
#25065
40K
24.85 mi16:07:394:49:2511:3911:24
13:20
#25090
25.2M
25.20 mi16:12:434:54:2911:415:04
14:42
#25097
Finish
26.22 mi16:25:015:06:4711:4312:18
12:04
#25115
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24960145241452424552(Top 92%)14322(Top 94%)14322(Top 271%)
10K6.21 mi3.10 mi24106+85414134+39014134+39023343(Top 88%)13787(Top 91%)13787(Top 261%)
15K9.32 mi3.11 mi24290-18414216-8214216-8224552(Top 92%)14322(Top 94%)14322(Top 271%)
20K12.43 mi3.11 mi24537-24714317-10114317-10125007(Top 94%)14504(Top 96%)14504(Top 274%)
Half13.11 mi0.68 mi24550-1314324-714324-724596(Top 92%)14313(Top 94%)14313(Top 271%)
25K15.53 mi2.42 mi24575-2514325-114325-124544(Top 92%)14272(Top 94%)14272(Top 270%)
30K18.64 mi3.11 mi24688-11314360-3514360-3525003(Top 94%)14415(Top 95%)14415(Top 273%)
20M20.00 mi1.36 mi24785-9714386-2614386-2625311(Top 95%)14528(Top 96%)14528(Top 275%)
21M21.00 mi1.00 mi24823-3814404-1814404-1825200(Top 95%)14468(Top 95%)14468(Top 274%)
35K21.75 mi0.75 mi24883-6014414-1014414-1025575(Top 96%)14621(Top 96%)14621(Top 277%)
23M23.00 mi1.25 mi24992-10914454-4014454-4025744(Top 97%)14700(Top 97%)14700(Top 278%)
24M24.00 mi1.00 mi25065-7314483-2914483-2925833(Top 97%)14723(Top 97%)14723(Top 279%)
40K24.85 mi0.85 mi25090-2514487-414487-425221(Top 95%)14414(Top 95%)14414(Top 273%)
25.2M25.20 mi0.35 mi25097-714486+114486+125512(Top 96%)14554(Top 96%)14554(Top 275%)
Finish26.22 mi1.02 mi25115-1814494-814494-825292(Top 95%)14458(Top 95%)14458(Top 274%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21stories
+97ft-345ft

Overall

24552

Males

14322

M18-39

14322

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

23343

Males

13787

M18-39

13787

10K→15K

6.2 - 9.3 mi

Top 92%
×3stories
+67ft-78ft

Overall

24552

Males

14322

M18-39

14322

15K→20K

9.3 - 12.4 mi

Top 94%
×5stories
+106ft-86ft

Overall

25007

Males

14504

M18-39

14504

20K→Half

12.4 - 13.1 mi

Top 92%
×2stories
+19ft-37ft

Overall

24596

Males

14313

M18-39

14313

Half→25K

13.1 - 15.5 mi

Top 92%
×4stories
+66ft-88ft

Overall

24544

Males

14272

M18-39

14272

25K→30K

15.5 - 18.6 mi

Top 94%
×9stories
+181ft-148ft

Overall

25003

Males

14415

M18-39

14415

30K→20M

18.6 - 20.0 mi

Top 95%
×5stories
+64ft-50ft

Overall

25311

Males

14528

M18-39

14528

20M→21M

20.0 - 21.0 mi

Top 95%
×8stories
+106ft-24ft

Overall

25200

Males

14468

M18-39

14468

21M→35K

21.0 - 21.8 mi

Top 96%
×7stories
+17ft-86ft

Overall

25575

Males

14621

M18-39

14621

35K→23M

21.8 - 23.0 mi

Top 97%
×5stories
+23ft-63ft

Overall

25744

Males

14700

M18-39

14700

23M→24M

23.0 - 24.0 mi

Top 97%
×6stories
+12ft-82ft

Overall

25833

Males

14723

M18-39

14723

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25221

Males

14414

M18-39

14414

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

25512

Males

14554

M18-39

14554

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2stories
+22ft-21ft

Overall

25292

Males

14458

M18-39

14458

Passing Analysis

Category:
Athletes Passed
1192
Passed By
1347
Net Change
-155
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24960
5K → 10K8639+854#24960#24106
10K → 15K59243-184#24106#24290
15K → 20K30277-247#24290#24537
20K → Half2538-13#24537#24550
Half → 25K6691-25#24550#24575
25K → 30K61174-113#24575#24688
30K → 20M21118-97#24688#24785
20M → 21M1755-38#24785#24823
21M → 35K1070-60#24823#24883
35K → 23M9118-109#24883#24992
23M → 24M376-73#24992#25065
24M → 40K1136-25#25065#25090
40K → 25.2M613-7#25090#25097
25.2M → Finish1129-18#25097#25115
TOTALS11921347-155
📊

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