Boston Marathon logo
BOSTON MARATHON 2023

David Stark

Bib: 3184•M

CO

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 3%
Gender (Male)
#0 / 15176
Top 6%
Division (M18-39)
#0 / 5285
Top 14%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:14
Rank: #1110
Start → 5K
19:14 | 6:11/mi
10K· 6.21 mi
37:46
Rank: #908 (+202)
5K → 10K
18:32 | 5:58/mi
15K· 9.32 mi
57:04
Rank: #1018 (-110)
10K → 15K
19:18 | 6:13/mi
20K· 12.43 mi
1:16:43
Rank: #1082 (-64)
15K → 20K
19:39 | 6:19/mi
Half· 13.11 mi
1:20:56
Rank: #1091 (-9)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:35:50
Rank: #1041 (+50)
Half → 25K
14:54 | 6:09/mi
30K· 18.64 mi
1:55:07
Rank: #951 (+90)
25K → 30K
19:17 | 6:12/mi
20M
2:03:50
Rank: #953 (-2)
30K → 20M
8:43 | 6:25/mi
21M
2:10:35
Rank: #953
20M → 21M
6:45 | 6:45/mi
35K· 21.75 mi
2:15:15
Rank: #956 (-3)
21M → 35K
4:40 | 6:14/mi
23M
2:23:15
Rank: #945 (+11)
35K → 23M
8:00 | 6:23/mi
24M
2:29:29
Rank: #935 (+10)
23M → 24M
6:14 | 6:14/mi
40K· 24.85 mi
2:34:58
Rank: #924 (+11)
24M → 40K
5:29 | 6:25/mi
25.2M
2:37:22
Rank: #925 (-1)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
2:43:40
Rank: #923 (+2)
25.2M → Finish
6:18 | 6:11/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
Time1:20:56
Pace6:10 /mi
2nd Half
Distance13.11 mi
Time1:22:44
Pace6:19 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:2019:146:1119:14
6:11
-
10K
6.21 mi10:39:5237:466:0518:32
5:58
-0:13
15K
9.32 mi10:59:1057:046:0719:18
6:13
+0:15
20K
12.43 mi11:18:491:16:436:1019:39
6:19
+0:06
Half
13.11 mi11:23:021:20:566:104:13
6:11
-0:08
25K
15.53 mi11:37:561:35:506:1014:54
6:09
-0:02
30K
18.64 mi11:57:131:55:076:1119:17
6:12
+0:03
20M
20.00 mi12:05:562:03:506:118:43
6:25
+0:13
21M
21.00 mi12:12:412:10:356:136:45
6:45
+0:20
35K
21.75 mi12:17:212:15:156:134:40
6:14
-0:31
23M
23.00 mi12:25:212:23:156:148:00
6:23
+0:09
24M
24.00 mi12:31:352:29:296:146:14
6:14
-0:09
40K
24.85 mi12:37:042:34:586:145:29
6:25
+0:11
25.2M
25.20 mi12:39:282:37:226:152:24
6:58
+0:33
Finish
26.22 mi12:45:462:43:406:156:18
6:11
-0:47

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

5:58 /mi

Average Pace

6:15 /mi

Slowest Pace

6:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:31

94% of race

Time at Steady Pace

9:09

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:15 /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 mi10:21:2019:146:1119:14
6:11
#1110
10K
6.21 mi10:39:5237:466:0518:32
5:58
#908
15K
9.32 mi10:59:1057:046:0719:18
6:13
#1018
20K
12.43 mi11:18:491:16:436:1019:39
6:19
#1082
Half
13.11 mi11:23:021:20:566:104:13
6:11
#1091
25K
15.53 mi11:37:561:35:506:1014:54
6:09
#1041
30K
18.64 mi11:57:131:55:076:1119:17
6:12
#951
20M
20.00 mi12:05:562:03:506:118:43
6:25
#953
21M
21.00 mi12:12:412:10:356:136:45
6:45
#953
35K
21.75 mi12:17:212:15:156:134:40
6:14
#956
23M
23.00 mi12:25:212:23:156:148:00
6:23
#945
24M
24.00 mi12:31:352:29:296:146:14
6:14
#935
40K
24.85 mi12:37:042:34:586:145:29
6:25
#924
25.2M
25.20 mi12:39:282:37:226:152:24
6:58
#925
Finish
26.22 mi12:45:462:43:406:156:18
6:11
#923
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1110104910491281(Top 5%)1219(Top 8%)1219(Top 23%)
10K6.21 mi3.10 mi908+202857+192857+192729(Top 3%)685(Top 5%)685(Top 13%)
15K9.32 mi3.11 mi1018-110965-108965-1081281(Top 5%)1219(Top 8%)1219(Top 23%)
20K12.43 mi3.11 mi1082-641027-621027-621484(Top 6%)1418(Top 9%)1418(Top 27%)
Half13.11 mi0.68 mi1091-91036-91036-91251(Top 5%)1199(Top 8%)1199(Top 23%)
25K15.53 mi2.42 mi1041+50989+47989+47855(Top 3%)810(Top 5%)810(Top 15%)
30K18.64 mi3.11 mi951+90903+86903+86699(Top 3%)662(Top 4%)662(Top 13%)
20M20.00 mi1.36 mi953-2905-2905-21168(Top 4%)1112(Top 7%)1112(Top 21%)
21M21.00 mi1.00 mi953906-1906-11245(Top 5%)1187(Top 8%)1187(Top 22%)
35K21.75 mi0.75 mi956-3909-3909-31342(Top 5%)1272(Top 8%)1272(Top 24%)
23M23.00 mi1.25 mi945+11898+11898+111062(Top 4%)1007(Top 7%)1007(Top 19%)
24M24.00 mi1.00 mi935+10888+10888+101111(Top 4%)1052(Top 7%)1052(Top 20%)
40K24.85 mi0.85 mi924+11877+11877+111228(Top 5%)1156(Top 8%)1156(Top 22%)
25.2M25.20 mi0.35 mi925-1878-1878-11576(Top 6%)1482(Top 10%)1482(Top 28%)
Finish26.22 mi1.02 mi923+2876+2876+21206(Top 5%)1147(Top 8%)1147(Top 22%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1281

Males

1219

M18-39

1219

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

729

Males

685

M18-39

685

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1281

Males

1219

M18-39

1219

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1484

Males

1418

M18-39

1418

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1251

Males

1199

M18-39

1199

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

855

Males

810

M18-39

810

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

699

Males

662

M18-39

662

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1168

Males

1112

M18-39

1112

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1245

Males

1187

M18-39

1187

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1342

Males

1272

M18-39

1272

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1062

Males

1007

M18-39

1007

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

1111

Males

1052

M18-39

1052

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1228

Males

1156

M18-39

1156

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1576

Males

1482

M18-39

1482

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1206

Males

1147

M18-39

1147

Passing Analysis

Category:
Athletes Passed
489
Passed By
302
Net Change
+187
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1110
5K → 10K2075+202#1110#908
10K → 15K7117-110#908#1018
15K → 20K1175-64#1018#1082
20K → Half413-9#1082#1091
Half → 25K533+50#1091#1041
25K → 30K944+90#1041#951
30K → 20M1618-2#951#953
20M → 21M16160#953#953
21M → 35K58-3#953#956
35K → 23M187+11#956#945
23M → 24M188+10#945#935
24M → 40K187+11#935#924
40K → 25.2M45-1#924#925
25.2M → Finish1816+2#925#923
TOTALS489302+187
📊

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