Boston Marathon logo
BOSTON MARATHON 2023

David Harper

Bib: 8582•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 17%
Gender (Male)
#0 / 15176
Top 28%
Masters (Masters Men)
#0 / 9891
Top 14%
Division (M55-59)
#0 / 1422
Top 3%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:37
Rank: #3137
Start → 5K
20:37 | 6:38/mi
10K· 6.21 mi
41:40
Rank: #4040 (-903)
5K → 10K
21:03 | 6:47/mi
15K· 9.32 mi
1:02:31
Rank: #4091 (-51)
10K → 15K
20:51 | 6:43/mi
20K· 12.43 mi
1:23:28
Rank: #4023 (+68)
15K → 20K
20:57 | 6:45/mi
Half· 13.11 mi
1:28:02
Rank: #4030 (-7)
20K → Half
4:34 | 6:42/mi
25K· 15.53 mi
1:44:40
Rank: #4118 (-88)
Half → 25K
16:38 | 6:52/mi
30K· 18.64 mi
2:06:20
Rank: #4095 (+23)
25K → 30K
21:40 | 6:58/mi
20M
2:15:58
Rank: #4143 (-48)
30K → 20M
9:38 | 7:05/mi
21M
2:23:35
Rank: #4201 (-58)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:28:59
Rank: #4315 (-114)
21M → 35K
5:24 | 7:13/mi
23M
2:38:08
Rank: #4404 (-89)
35K → 23M
9:09 | 7:18/mi
24M
2:45:11
Rank: #4438 (-34)
23M → 24M
7:03 | 7:03/mi
40K· 24.85 mi
2:51:30
Rank: #4479 (-41)
24M → 40K
6:19 | 7:23/mi
25.2M
2:54:14
Rank: #4494 (-15)
40K → 25.2M
2:44 | 7:56/mi
Finish· 26.22 mi
3:01:35
Rank: #4534 (-40)
25.2M → Finish
7:21 | 7:13/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
Time1:28:02
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:33:33
Pace7:08 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:4220:376:3820:37
6:38
-
10K
6.21 mi11:06:4541:406:4221:03
6:47
+0:09
15K
9.32 mi11:27:361:02:316:4220:51
6:43
-0:04
20K
12.43 mi11:48:331:23:286:4320:57
6:45
+0:02
Half
13.11 mi11:53:071:28:026:434:34
6:42
-0:03
25K
15.53 mi12:09:451:44:406:4416:38
6:52
+0:10
30K
18.64 mi12:31:252:06:206:4721:40
6:58
+0:06
20M
20.00 mi12:41:032:15:586:489:38
7:05
+0:07
21M
21.00 mi12:48:402:23:356:507:37
7:37
+0:32
35K
21.75 mi12:54:042:28:596:515:24
7:13
-0:24
23M
23.00 mi13:03:132:38:086:539:09
7:18
+0:05
24M
24.00 mi13:10:162:45:116:537:03
7:03
-0:15
40K
24.85 mi13:16:352:51:306:546:19
7:23
+0:20
25.2M
25.20 mi13:19:192:54:146:552:44
7:56
+0:33
Finish
26.22 mi13:26:403:01:356:567:21
7:13
-0:43

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

6:38 /mi

Average Pace

6:56 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:35:46

86% of race

Time at Steady Pace

23:05

13% of race

Time at Slower Pace

2:44

2% of race

Average Pace: 6:56 /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 mi10:45:4220:376:3820:37
6:38
#3137
10K
6.21 mi11:06:4541:406:4221:03
6:47
#4040
15K
9.32 mi11:27:361:02:316:4220:51
6:43
#4091
20K
12.43 mi11:48:331:23:286:4320:57
6:45
#4023
Half
13.11 mi11:53:071:28:026:434:34
6:42
#4030
25K
15.53 mi12:09:451:44:406:4416:38
6:52
#4118
30K
18.64 mi12:31:252:06:206:4721:40
6:58
#4095
20M
20.00 mi12:41:032:15:586:489:38
7:05
#4143
21M
21.00 mi12:48:402:23:356:507:37
7:37
#4201
35K
21.75 mi12:54:042:28:596:515:24
7:13
#4315
23M
23.00 mi13:03:132:38:086:539:09
7:18
#4404
24M
24.00 mi13:10:162:45:116:537:03
7:03
#4438
40K
24.85 mi13:16:352:51:306:546:19
7:23
#4479
25.2M
25.20 mi13:19:192:54:146:552:44
7:56
#4494
Finish
26.22 mi13:26:403:01:356:567:21
7:13
#4534
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi3137296529654239(Top 16%)3976(Top 26%)3976(Top 280%)
10K6.21 mi3.10 mi4040-9033797-8323797-8325049(Top 19%)4672(Top 31%)4672(Top 329%)
15K9.32 mi3.11 mi4091-513845-483845-484239(Top 16%)3976(Top 26%)3976(Top 280%)
20K12.43 mi3.11 mi4023+683781+643781+643929(Top 15%)3703(Top 24%)3703(Top 260%)
Half13.11 mi0.68 mi4030-73786-53786-54300(Top 16%)4024(Top 27%)4024(Top 283%)
25K15.53 mi2.42 mi4118-883864-783864-784657(Top 17%)4332(Top 29%)4332(Top 305%)
30K18.64 mi3.11 mi4095+233848+163848+164181(Top 16%)3901(Top 26%)3901(Top 274%)
20M20.00 mi1.36 mi4143-483888-403888-404545(Top 17%)4170(Top 27%)4170(Top 293%)
21M21.00 mi1.00 mi4201-583934-463934-465159(Top 19%)4584(Top 30%)4584(Top 322%)
35K21.75 mi0.75 mi4315-1144033-994033-996572(Top 25%)5609(Top 37%)5609(Top 394%)
23M23.00 mi1.25 mi4404-894113-804113-805332(Top 20%)4707(Top 31%)4707(Top 331%)
24M24.00 mi1.00 mi4438-344141-284141-284886(Top 18%)4338(Top 29%)4338(Top 305%)
40K24.85 mi0.85 mi4479-414174-334174-335955(Top 22%)4979(Top 33%)4979(Top 350%)
25.2M25.20 mi0.35 mi4494-154187-134187-135986(Top 22%)4917(Top 32%)4917(Top 346%)
Finish26.22 mi1.02 mi4534-404213-264213-266483(Top 24%)5234(Top 34%)5234(Top 368%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4239

Males

3976

M55-59

3976

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5049

Males

4672

M55-59

4672

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4239

Males

3976

M55-59

3976

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

3929

Males

3703

M55-59

3703

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4300

Males

4024

M55-59

4024

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4657

Males

4332

M55-59

4332

25K→30K

15.5 - 18.6 mi

Top 16%
×9stories
+181ft-148ft

Overall

4181

Males

3901

M55-59

3901

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4545

Males

4170

M55-59

4170

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5159

Males

4584

M55-59

4584

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

6572

Males

5609

M55-59

5609

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5332

Males

4707

M55-59

4707

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4886

Males

4338

M55-59

4338

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

5955

Males

4979

M55-59

4979

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

5986

Males

4917

M55-59

4917

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6483

Males

5234

M55-59

5234

Passing Analysis

Category:
Athletes Passed
717
Passed By
2114
Net Change
-1397
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3137
5K → 10K19922-903#3137#4040
10K → 15K95146-51#4040#4091
15K → 20K14274+68#4091#4023
20K → Half1724-7#4023#4030
Half → 25K51139-88#4030#4118
25K → 30K125102+23#4118#4095
30K → 20M4290-48#4095#4143
20M → 21M51109-58#4143#4201
21M → 35K12126-114#4201#4315
35K → 23M51140-89#4315#4404
23M → 24M3468-34#4404#4438
24M → 40K3071-41#4438#4479
40K → 25.2M1530-15#4479#4494
25.2M → Finish3373-40#4494#4534
TOTALS7172114-1397
📊

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