Boston Marathon logo
BOSTON MARATHON 2023

Scott Johnson

Bib: 586•M

IA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 3%
Gender (Male)
#0 / 15176
Top 5%
Masters (Masters Men)
#0 / 9891
Top 1%
Division (M40-44)
#0 / 2241
Top 4%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:49
Rank: #801
Start → 5K
18:49 | 6:03/mi
10K· 6.21 mi
37:42
Rank: #883 (-82)
5K → 10K
18:53 | 6:05/mi
15K· 9.32 mi
56:39
Rank: #892 (-9)
10K → 15K
18:57 | 6:06/mi
20K· 12.43 mi
1:17:41
Rank: #1316 (-424)
15K → 20K
21:02 | 6:46/mi
Half· 13.11 mi
1:21:52
Rank: #1297 (+19)
20K → Half
4:11 | 6:08/mi
25K· 15.53 mi
1:36:51
Rank: #1226 (+71)
Half → 25K
14:59 | 6:11/mi
30K· 18.64 mi
1:56:28
Rank: #1162 (+64)
25K → 30K
19:37 | 6:19/mi
20M
2:04:59
Rank: #1111 (+51)
30K → 20M
8:31 | 6:16/mi
21M
2:11:34
Rank: #1079 (+32)
20M → 21M
6:35 | 6:35/mi
35K· 21.75 mi
2:16:02
Rank: #1047 (+32)
21M → 35K
4:28 | 5:58/mi
23M
2:23:41
Rank: #986 (+61)
35K → 23M
7:39 | 6:07/mi
24M
2:29:32
Rank: #939 (+47)
23M → 24M
5:51 | 5:51/mi
40K· 24.85 mi
2:34:37
Rank: #897 (+42)
24M → 40K
5:05 | 5:57/mi
25.2M
2:36:48
Rank: #874 (+23)
40K → 25.2M
2:11 | 6:20/mi
Finish· 26.22 mi
2:42:39
Rank: #826 (+48)
25.2M → Finish
5:51 | 5:44/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
Distance13.11 mi
Time1:21:52
Pace6:15 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:20:47
Pace6:10 /mi
📊Negative Split: 1.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:0218:496:0318:49
6:03
-
10K
6.21 mi10:37:5537:426:0418:53
6:05
+0:02
15K
9.32 mi10:56:5256:396:0518:57
6:06
+0:01
20K
12.43 mi11:17:541:17:416:1521:02
6:46
+0:40
Half
13.11 mi11:22:051:21:526:154:11
6:08
-0:38
25K
15.53 mi11:37:041:36:516:1414:59
6:11
+0:03
30K
18.64 mi11:56:411:56:286:1519:37
6:19
+0:08
20M
20.00 mi12:05:122:04:596:158:31
6:16
-0:03
21M
21.00 mi12:11:472:11:346:166:35
6:35
+0:19
35K
21.75 mi12:16:152:16:026:154:28
5:58
-0:37
23M
23.00 mi12:23:542:23:416:157:39
6:07
+0:09
24M
24.00 mi12:29:452:29:326:145:51
5:51
-0:16
40K
24.85 mi12:34:502:34:376:135:05
5:57
+0:06
25.2M
25.20 mi12:37:012:36:486:132:11
6:20
+0:23
Finish
26.22 mi12:42:522:42:396:125:51
5:44
-0:36

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

5:44 /mi

Average Pace

6:12 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:14

70% of race

Time at Steady Pace

28:23

17% of race

Time at Slower Pace

21:02

13% of race

Average Pace: 6:12 /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 mi10:19:0218:496:0318:49
6:03
#801
10K
6.21 mi10:37:5537:426:0418:53
6:05
#883
15K
9.32 mi10:56:5256:396:0518:57
6:06
#892
20K
12.43 mi11:17:541:17:416:1521:02
6:46
#1316
Half
13.11 mi11:22:051:21:526:154:11
6:08
#1297
25K
15.53 mi11:37:041:36:516:1414:59
6:11
#1226
30K
18.64 mi11:56:411:56:286:1519:37
6:19
#1162
20M
20.00 mi12:05:122:04:596:158:31
6:16
#1111
21M
21.00 mi12:11:472:11:346:166:35
6:35
#1079
35K
21.75 mi12:16:152:16:026:154:28
5:58
#1047
23M
23.00 mi12:23:542:23:416:157:39
6:07
#986
24M
24.00 mi12:29:452:29:326:145:51
5:51
#939
40K
24.85 mi12:34:502:34:376:135:05
5:57
#897
25.2M
25.20 mi12:37:012:36:486:132:11
6:20
#874
Finish
26.22 mi12:42:522:42:396:125:51
5:44
#826
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi801752752970(Top 4%)921(Top 6%)921(Top 41%)
10K6.21 mi3.10 mi883-82833-81833-81997(Top 4%)947(Top 6%)947(Top 42%)
15K9.32 mi3.11 mi892-9842-9842-9970(Top 4%)921(Top 6%)921(Top 41%)
20K12.43 mi3.11 mi1316-4241253-4111253-4114148(Top 16%)3887(Top 26%)3887(Top 173%)
Half13.11 mi0.68 mi1297+191235+181235+181096(Top 4%)1045(Top 7%)1045(Top 47%)
25K15.53 mi2.42 mi1226+711171+641171+64941(Top 4%)893(Top 6%)893(Top 40%)
30K18.64 mi3.11 mi1162+641109+621109+62937(Top 4%)892(Top 6%)892(Top 40%)
20M20.00 mi1.36 mi1111+511058+511058+51788(Top 3%)748(Top 5%)748(Top 33%)
21M21.00 mi1.00 mi1079+321026+321026+32826(Top 3%)782(Top 5%)782(Top 35%)
35K21.75 mi0.75 mi1047+32997+29997+29631(Top 2%)593(Top 4%)593(Top 26%)
23M23.00 mi1.25 mi986+61939+58939+58478(Top 2%)447(Top 3%)447(Top 20%)
24M24.00 mi1.00 mi939+47892+47892+47321(Top 1%)295(Top 2%)295(Top 13%)
40K24.85 mi0.85 mi897+42850+42850+42282(Top 1%)259(Top 2%)259(Top 12%)
25.2M25.20 mi0.35 mi874+23828+22828+22274(Top 1%)254(Top 2%)254(Top 11%)
Finish26.22 mi1.02 mi826+48782+46782+46294(Top 1%)276(Top 2%)276(Top 12%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

970

Males

921

M40-44

921

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

997

Males

947

M40-44

947

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

970

Males

921

M40-44

921

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4148

Males

3887

M40-44

3887

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1096

Males

1045

M40-44

1045

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

941

Males

893

M40-44

893

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

937

Males

892

M40-44

892

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

788

Males

748

M40-44

748

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

826

Males

782

M40-44

782

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

631

Males

593

M40-44

593

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

478

Males

447

M40-44

447

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

321

Males

295

M40-44

295

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

282

Males

259

M40-44

259

40K→25.2M

24.9 - 25.2 mi

Top 1%
×1story
+13ft-16ft

Overall

274

Males

254

M40-44

254

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

294

Males

276

M40-44

276

Passing Analysis

Category:
Athletes Passed
549
Passed By
574
Net Change
-25
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#801
5K → 10K1698-82#801#883
10K → 15K1928-9#883#892
15K → 20K0424-424#892#1316
20K → Half201+19#1316#1297
Half → 25K721+71#1297#1226
25K → 30K728+64#1226#1162
30K → 20M554+51#1162#1111
20M → 21M397+32#1111#1079
21M → 35K320+32#1079#1047
35K → 23M610+61#1047#986
23M → 24M470+47#986#939
24M → 40K431+42#939#897
40K → 25.2M230+23#897#874
25.2M → Finish502+48#874#826
TOTALS549574-25
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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