Boston Marathon logo
BOSTON MARATHON 2023

Jason Macdonald

Bib: 29554•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:26
Rank: #22901
Start → 5K
30:26 | 9:48/mi
10K· 6.21 mi
59:47
Rank: #22664 (+237)
5K → 10K
29:21 | 9:27/mi
15K· 9.32 mi
1:28:12
Rank: #22181 (+483)
10K → 15K
28:25 | 9:09/mi
20K· 12.43 mi
1:56:14
Rank: #21676 (+505)
15K → 20K
28:02 | 9:01/mi
Half· 13.11 mi
2:02:17
Rank: #21593 (+83)
20K → Half
6:03 | 8:52/mi
25K· 15.53 mi
2:24:18
Rank: #21249 (+344)
Half → 25K
22:01 | 9:05/mi
30K· 18.64 mi
2:53:29
Rank: #20845 (+404)
25K → 30K
29:11 | 9:24/mi
20M
3:06:38
Rank: #20708 (+137)
30K → 20M
13:09 | 9:41/mi
21M
3:17:02
Rank: #20621 (+87)
20M → 21M
10:24 | 10:24/mi
35K· 21.75 mi
3:24:23
Rank: #20626 (-5)
21M → 35K
7:21 | 9:49/mi
23M
3:37:29
Rank: #20653 (-27)
35K → 23M
13:06 | 10:28/mi
24M
3:47:36
Rank: #20680 (-27)
23M → 24M
10:07 | 10:07/mi
40K· 24.85 mi
3:56:26
Rank: #20672 (+8)
24M → 40K
8:50 | 10:20/mi
25.2M
4:01:22
Rank: #20808 (-136)
40K → 25.2M
4:56 | 14:18/mi
Finish· 26.22 mi
4:12:08
Rank: #20895 (-87)
25.2M → Finish
10:46 | 10:34/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
Time2:02:17
Pace9:20 /mi
2nd Half
Distance13.11 mi
Time2:09:51
Pace9:54 /mi
📊Positive Split: 6.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:3630:269:4830:26
9:48
-
10K
6.21 mi12:17:5759:479:3729:21
9:27
-0:21
15K
9.32 mi12:46:221:28:129:2828:25
9:09
-0:18
20K
12.43 mi13:14:241:56:149:2128:02
9:01
-0:08
Half
13.11 mi13:20:272:02:179:206:03
8:52
-0:09
25K
15.53 mi13:42:282:24:189:1722:01
9:05
+0:13
30K
18.64 mi14:11:392:53:299:1829:11
9:24
+0:19
20M
20.00 mi14:24:483:06:389:2013:09
9:41
+0:17
21M
21.00 mi14:35:123:17:029:2310:24
10:24
+0:43
35K
21.75 mi14:42:333:24:239:247:21
9:49
-0:35
23M
23.00 mi14:55:393:37:299:2713:06
10:28
+0:39
24M
24.00 mi15:05:463:47:369:2910:07
10:07
-0:21
40K
24.85 mi15:14:363:56:269:318:50
10:20
+0:13
25.2M
25.20 mi15:19:324:01:229:354:56
14:18
+3:58
Finish
26.22 mi15:30:184:12:089:3710:46
10:34
-3:44

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

8:52 /mi

Average Pace

9:37 /mi

Slowest Pace

14:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:31

34% of race

Time at Steady Pace

2:18:49

55% of race

Time at Slower Pace

28:48

11% of race

Average Pace: 9:37 /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 mi11:48:3630:269:4830:26
9:48
#22901
10K
6.21 mi12:17:5759:479:3729:21
9:27
#22664
15K
9.32 mi12:46:221:28:129:2828:25
9:09
#22181
20K
12.43 mi13:14:241:56:149:2128:02
9:01
#21676
Half
13.11 mi13:20:272:02:179:206:03
8:52
#21593
25K
15.53 mi13:42:282:24:189:1722:01
9:05
#21249
30K
18.64 mi14:11:392:53:299:1829:11
9:24
#20845
20M
20.00 mi14:24:483:06:389:2013:09
9:41
#20708
21M
21.00 mi14:35:123:17:029:2310:24
10:24
#20621
35K
21.75 mi14:42:333:24:239:247:21
9:49
#20626
23M
23.00 mi14:55:393:37:299:2713:06
10:28
#20653
24M
24.00 mi15:05:463:47:369:2910:07
10:07
#20680
40K
24.85 mi15:14:363:56:269:318:50
10:20
#20672
25.2M
25.20 mi15:19:324:01:229:354:56
14:18
#20808
Finish
26.22 mi15:30:184:12:089:3710:46
10:34
#20895
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi22901135461354621125(Top 79%)12806(Top 84%)12806(Top 571%)
10K6.21 mi3.10 mi22664+23713462+8413462+8422346(Top 84%)13319(Top 88%)13319(Top 594%)
15K9.32 mi3.11 mi22181+48313233+22913233+22921125(Top 79%)12806(Top 84%)12806(Top 571%)
20K12.43 mi3.11 mi21676+50513007+22613007+22619807(Top 74%)12226(Top 81%)12226(Top 546%)
Half13.11 mi0.68 mi21593+8312970+3712970+3719831(Top 74%)12244(Top 81%)12244(Top 546%)
25K15.53 mi2.42 mi21249+34412818+15212818+15219330(Top 73%)11988(Top 79%)11988(Top 535%)
30K18.64 mi3.11 mi20845+40412641+17712641+17719007(Top 71%)11791(Top 78%)11791(Top 526%)
20M20.00 mi1.36 mi20708+13712554+8712554+8719492(Top 73%)11904(Top 78%)11904(Top 531%)
21M21.00 mi1.00 mi20621+8712507+4712507+4719267(Top 72%)11750(Top 77%)11750(Top 524%)
35K21.75 mi0.75 mi20626-512500+712500+720815(Top 78%)12393(Top 82%)12393(Top 553%)
23M23.00 mi1.25 mi20653-2712494+612494+621215(Top 80%)12556(Top 83%)12556(Top 560%)
24M24.00 mi1.00 mi20680-2712495-112495-121101(Top 79%)12470(Top 82%)12470(Top 556%)
40K24.85 mi0.85 mi20672+812480+1512480+1520812(Top 78%)12295(Top 81%)12295(Top 549%)
25.2M25.20 mi0.35 mi20808-13612534-5412534-5425222(Top 95%)14398(Top 95%)14398(Top 642%)
Finish26.22 mi1.02 mi20895-8712562-2812562-2823127(Top 87%)13397(Top 88%)13397(Top 598%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

21125

Males

12806

M40-44

12806

5K→10K

3.1 - 6.2 mi

Top 84%
×5stories
+79ft-138ft

Overall

22346

Males

13319

M40-44

13319

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

21125

Males

12806

M40-44

12806

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

19807

Males

12226

M40-44

12226

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

19831

Males

12244

M40-44

12244

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19330

Males

11988

M40-44

11988

25K→30K

15.5 - 18.6 mi

Top 71%
×9stories
+181ft-148ft

Overall

19007

Males

11791

M40-44

11791

30K→20M

18.6 - 20.0 mi

Top 73%
×5stories
+64ft-50ft

Overall

19492

Males

11904

M40-44

11904

20M→21M

20.0 - 21.0 mi

Top 72%
×8stories
+106ft-24ft

Overall

19267

Males

11750

M40-44

11750

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

20815

Males

12393

M40-44

12393

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

21215

Males

12556

M40-44

12556

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

21101

Males

12470

M40-44

12470

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20812

Males

12295

M40-44

12295

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

25222

Males

14398

M40-44

14398

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

23127

Males

13397

M40-44

13397

Passing Analysis

Category:
Athletes Passed
2708
Passed By
702
Net Change
+2006
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22901
5K → 10K380143+237#22901#22664
10K → 15K49613+483#22664#22181
15K → 20K5094+505#22181#21676
20K → Half852+83#21676#21593
Half → 25K3495+344#21593#21249
25K → 30K41511+404#21249#20845
30K → 20M15013+137#20845#20708
20M → 21M12235+87#20708#20621
21M → 35K4146-5#20621#20626
35K → 23M6289-27#20626#20653
23M → 24M3663-27#20653#20680
24M → 40K4436+8#20680#20672
40K → 25.2M0136-136#20672#20808
25.2M → Finish19106-87#20808#20895
TOTALS2708702+2006
📊

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