Boston Marathon logo
BOSTON MARATHON 2023

Derek Johnson

Bib: 2920•M

WI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 16%
Gender (Male)
#0 / 15176
Top 27%
Masters (Masters Men)
#0 / 9891
Top 13%
Division (M40-44)
#0 / 2241
Top 32%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:54
Rank: #3905
Start → 5K
20:54 | 6:44/mi
10K· 6.21 mi
41:35
Rank: #3895 (+10)
5K → 10K
20:41 | 6:39/mi
15K· 9.32 mi
1:02:12
Rank: #3751 (+144)
10K → 15K
20:37 | 6:38/mi
20K· 12.43 mi
1:23:11
Rank: #3809 (-58)
15K → 20K
20:59 | 6:45/mi
Half· 13.11 mi
1:27:46
Rank: #3847 (-38)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:44:22
Rank: #3947 (-100)
Half → 25K
16:36 | 6:51/mi
30K· 18.64 mi
2:06:01
Rank: #3954 (-7)
25K → 30K
21:39 | 6:58/mi
20M
2:15:37
Rank: #3977 (-23)
30K → 20M
9:36 | 7:04/mi
21M
2:22:58
Rank: #3944 (+33)
20M → 21M
7:21 | 7:21/mi
35K· 21.75 mi
2:28:14
Rank: #4022 (-78)
21M → 35K
5:16 | 7:02/mi
23M
2:37:22
Rank: #4135 (-113)
35K → 23M
9:08 | 7:18/mi
24M
2:44:25
Rank: #4192 (-57)
23M → 24M
7:03 | 7:03/mi
40K· 24.85 mi
2:50:37
Rank: #4234 (-42)
24M → 40K
6:12 | 7:15/mi
25.2M
2:53:17
Rank: #4244 (-10)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
3:00:38
Rank: #4336 (-92)
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
Time1:27:46
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:32:52
Pace7:05 /mi
📊Positive Split: 5.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:0620:546:4420:54
6:44
-
10K
6.21 mi10:42:4741:356:4220:41
6:39
-0:05
15K
9.32 mi11:03:241:02:126:4020:37
6:38
-0:01
20K
12.43 mi11:24:231:23:116:4220:59
6:45
+0:07
Half
13.11 mi11:28:581:27:466:424:35
6:43
-0:02
25K
15.53 mi11:45:341:44:226:4316:36
6:51
+0:08
30K
18.64 mi12:07:132:06:016:4621:39
6:58
+0:07
20M
20.00 mi12:16:492:15:376:479:36
7:04
+0:06
21M
21.00 mi12:24:102:22:586:487:21
7:21
+0:17
35K
21.75 mi12:29:262:28:146:495:16
7:02
-0:19
23M
23.00 mi12:38:342:37:226:519:08
7:18
+0:16
24M
24.00 mi12:45:372:44:256:517:03
7:03
-0:15
40K
24.85 mi12:51:492:50:376:526:12
7:15
+0:12
25.2M
25.20 mi12:54:292:53:176:532:40
7:44
+0:29
Finish
26.22 mi13:01:503:00:386:547:21
7:13
-0:31

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

6:54 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:29

89% of race

Time at Steady Pace

19:09

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:53 /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 mi10:22:0620:546:4420:54
6:44
#3905
10K
6.21 mi10:42:4741:356:4220:41
6:39
#3895
15K
9.32 mi11:03:241:02:126:4020:37
6:38
#3751
20K
12.43 mi11:24:231:23:116:4220:59
6:45
#3809
Half
13.11 mi11:28:581:27:466:424:35
6:43
#3847
25K
15.53 mi11:45:341:44:226:4316:36
6:51
#3947
30K
18.64 mi12:07:132:06:016:4621:39
6:58
#3954
20M
20.00 mi12:16:492:15:376:479:36
7:04
#3977
21M
21.00 mi12:24:102:22:586:487:21
7:21
#3944
35K
21.75 mi12:29:262:28:146:495:16
7:02
#4022
23M
23.00 mi12:38:342:37:226:519:08
7:18
#4135
24M
24.00 mi12:45:372:44:256:517:03
7:03
#4192
40K
24.85 mi12:51:492:50:376:526:12
7:15
#4234
25.2M
25.20 mi12:54:292:53:176:532:40
7:44
#4244
Finish
26.22 mi13:01:503:00:386:547:21
7:13
#4336
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3905366636663587(Top 13%)3391(Top 22%)3391(Top 151%)
10K6.21 mi3.10 mi3895+103667-13667-13950(Top 15%)3720(Top 25%)3720(Top 166%)
15K9.32 mi3.11 mi3751+1443540+1273540+1273587(Top 13%)3391(Top 22%)3391(Top 151%)
20K12.43 mi3.11 mi3809-583598-583598-584017(Top 15%)3771(Top 25%)3771(Top 168%)
Half13.11 mi0.68 mi3847-383630-323630-324515(Top 17%)4207(Top 28%)4207(Top 188%)
25K15.53 mi2.42 mi3947-1003717-873717-874546(Top 17%)4233(Top 28%)4233(Top 189%)
30K18.64 mi3.11 mi3954-73725-83725-84143(Top 16%)3864(Top 25%)3864(Top 172%)
20M20.00 mi1.36 mi3977-233739-143739-144404(Top 17%)4053(Top 27%)4053(Top 181%)
21M21.00 mi1.00 mi3944+333711+283711+283884(Top 15%)3592(Top 24%)3592(Top 160%)
35K21.75 mi0.75 mi4022-783774-633774-635514(Top 21%)4877(Top 32%)4877(Top 218%)
23M23.00 mi1.25 mi4135-1133873-993873-995261(Top 20%)4648(Top 31%)4648(Top 207%)
24M24.00 mi1.00 mi4192-573923-503923-504885(Top 18%)4337(Top 29%)4337(Top 194%)
40K24.85 mi0.85 mi4234-423960-373960-375129(Top 19%)4425(Top 29%)4425(Top 197%)
25.2M25.20 mi0.35 mi4244-103964-43964-44971(Top 19%)4248(Top 28%)4248(Top 190%)
Finish26.22 mi1.02 mi4336-924044-804044-806482(Top 24%)5233(Top 34%)5233(Top 234%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3587

Males

3391

M40-44

3391

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

3950

Males

3720

M40-44

3720

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3587

Males

3391

M40-44

3391

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4017

Males

3771

M40-44

3771

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4515

Males

4207

M40-44

4207

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4546

Males

4233

M40-44

4233

25K→30K

15.5 - 18.6 mi

Top 16%
×9stories
+181ft-148ft

Overall

4143

Males

3864

M40-44

3864

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4404

Males

4053

M40-44

4053

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

3884

Males

3592

M40-44

3592

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

5514

Males

4877

M40-44

4877

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5261

Males

4648

M40-44

4648

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4885

Males

4337

M40-44

4337

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5129

Males

4425

M40-44

4425

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

4971

Males

4248

M40-44

4248

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6482

Males

5233

M40-44

5233

Passing Analysis

Category:
Athletes Passed
982
Passed By
1413
Net Change
-431
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3905
5K → 10K223213+10#3905#3895
10K → 15K20258+144#3895#3751
15K → 20K80138-58#3751#3809
20K → Half1351-38#3809#3847
Half → 25K44144-100#3847#3947
25K → 30K114121-7#3947#3954
30K → 20M5376-23#3954#3977
20M → 21M8855+33#3977#3944
21M → 35K1896-78#3944#4022
35K → 23M29142-113#4022#4135
23M → 24M3996-57#4135#4192
24M → 40K4385-42#4192#4234
40K → 25.2M1626-10#4234#4244
25.2M → Finish20112-92#4244#4336
TOTALS9821413-431
📊

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