Boston Marathon logo
BOSTON MARATHON 2023

Brian Stewart

Bib: 21381•M

BC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:47/mi
27:18
↑ 97↓ 3451.5%
10K· 6.21 mi
8:44/mi
54:26
↑ 79↓ 1380.4%
15K· 9.32 mi
8:45/mi
1:21:36
↑ 67↓ 78
20K· 12.43 mi
8:51/mi
1:49:07
↑ 106↓ 860.1%
Half· 13.11 mi
8:51/mi
1:55:09
↑ 19↓ 370.5%
25K· 15.53 mi
9:00/mi
2:16:58
↑ 66↓ 880.2%
30K· 18.64 mi
9:12/mi
2:45:34
↑ 181↓ 1480.2%
20M
9:31/mi
2:58:30
↑ 64↓ 500.2%
21M
10:10/mi
3:08:40
↑ 106↓ 241.6%
35K· 21.75 mi
9:21/mi
3:15:40
↑ 17↓ 861.7%
23M
9:34/mi
3:27:39
↑ 23↓ 630.6%
24M
9:38/mi
3:37:17
↓ 821.3%
40K· 24.85 mi
9:58/mi
3:45:48
↓ 200.3%
25.2M
10:55/mi
3:49:34
↑ 13↓ 160.2%
Finish· 26.22 mi
9:28/mi
3:59:13
↑ 22↓ 21

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
Time1:55:09
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:04:04
Pace9:28 /mi
📊Positive Split: 7.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:1527:188:4727:18
8:47
-
10K
6.21 mi11:49:2354:268:4627:08
8:44
-0:03
15K
9.32 mi12:16:331:21:368:4527:10
8:45
+0:01
20K
12.43 mi12:44:041:49:078:4727:31
8:51
+0:06
Half
13.11 mi12:50:061:55:098:476:02
8:51
0:00
25K
15.53 mi13:11:552:16:588:4921:49
9:00
+0:09
30K
18.64 mi13:40:312:45:348:5328:36
9:12
+0:12
20M
20.00 mi13:53:272:58:308:5512:56
9:31
+0:19
21M
21.00 mi14:03:373:08:408:5910:10
10:10
+0:39
35K
21.75 mi14:10:373:15:409:007:00
9:21
-0:49
23M
23.00 mi14:22:363:27:399:0211:59
9:34
+0:13
24M
24.00 mi14:32:143:37:179:039:38
9:38
+0:04
40K
24.85 mi14:40:453:45:489:058:31
9:58
+0:20
25.2M
25.20 mi14:44:313:49:349:073:46
10:55
+0:57
Finish
26.22 mi14:54:103:59:139:089:39
9:28
-1:27

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

8:44 /mi

Average Pace

9:08 /mi

Slowest Pace

10:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:58

57% of race

Time at Steady Pace

1:19:48

33% of race

Time at Slower Pace

22:27

9% of race

Average Pace: 9:07 /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 mi11:22:1527:188:4727:18
8:47
#19384
10K
6.21 mi11:49:2354:268:4627:08
8:44
#19455
15K
9.32 mi12:16:331:21:368:4527:10
8:45
#19359
20K
12.43 mi12:44:041:49:078:4727:31
8:51
#19226
Half
13.11 mi12:50:061:55:098:476:02
8:51
#19239
25K
15.53 mi13:11:552:16:588:4921:49
9:00
#19180
30K
18.64 mi13:40:312:45:348:5328:36
9:12
#19010
20M
20.00 mi13:53:272:58:308:5512:56
9:31
#18991
21M
21.00 mi14:03:373:08:408:5910:10
10:10
#18979
35K
21.75 mi14:10:373:15:409:007:00
9:21
#18992
23M
23.00 mi14:22:363:27:399:0211:59
9:34
#18968
24M
24.00 mi14:32:143:37:179:039:38
9:38
#19020
40K
24.85 mi14:40:453:45:489:058:31
9:58
#19059
25.2M
25.20 mi14:44:313:49:349:073:46
10:55
#19104
Finish
26.22 mi14:54:103:59:139:089:39
9:28
#19174
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi19384119331193319198(Top 72%)11961(Top 79%)11961(Top 1078%)
10K6.21 mi3.10 mi19455-7112002-6912002-6919592(Top 74%)12128(Top 80%)12128(Top 1093%)
15K9.32 mi3.11 mi19359+9611980+2211980+2219198(Top 72%)11961(Top 79%)11961(Top 1078%)
20K12.43 mi3.11 mi19226+13311951+2911951+2918965(Top 71%)11873(Top 78%)11873(Top 1070%)
Half13.11 mi0.68 mi19239-1311957-611957-619797(Top 74%)12211(Top 80%)12211(Top 1100%)
25K15.53 mi2.42 mi19180+5911934+2311934+2318937(Top 71%)11824(Top 78%)11824(Top 1065%)
30K18.64 mi3.11 mi19010+17011846+8811846+8818191(Top 68%)11413(Top 75%)11413(Top 1028%)
20M20.00 mi1.36 mi18991+1911816+3011816+3018913(Top 71%)11643(Top 77%)11643(Top 1049%)
21M21.00 mi1.00 mi18979+1211804+1211804+1218598(Top 70%)11472(Top 76%)11472(Top 1034%)
35K21.75 mi0.75 mi18992-1311798+611798+619349(Top 73%)11750(Top 77%)11750(Top 1059%)
23M23.00 mi1.25 mi18968+2411781+1711781+1718602(Top 70%)11398(Top 75%)11398(Top 1027%)
24M24.00 mi1.00 mi19020-5211791-1011791-1019675(Top 74%)11855(Top 78%)11855(Top 1068%)
40K24.85 mi0.85 mi19059-3911805-1411805-1419855(Top 75%)11856(Top 78%)11856(Top 1068%)
25.2M25.20 mi0.35 mi19104-4511820-1511820-1520250(Top 76%)12039(Top 79%)12039(Top 1085%)
Finish26.22 mi1.02 mi19174-7011847-2711847-2720001(Top 75%)11979(Top 79%)11979(Top 1079%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

19198

Males

11961

M60-64

11961

5K→10K

3.1 - 6.2 mi

Top 74%
×5story building
+79ft-138ft

Overall

19592

Males

12128

M60-64

12128

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

19198

Males

11961

M60-64

11961

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

18965

Males

11873

M60-64

11873

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

19797

Males

12211

M60-64

12211

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

18937

Males

11824

M60-64

11824

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

18191

Males

11413

M60-64

11413

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

18913

Males

11643

M60-64

11643

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18598

Males

11472

M60-64

11472

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19349

Males

11750

M60-64

11750

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

18602

Males

11398

M60-64

11398

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19675

Males

11855

M60-64

11855

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

19855

Males

11856

M60-64

11856

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

20250

Males

12039

M60-64

12039

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

20001

Males

11979

M60-64

11979

Passing Analysis

Category:
Athletes Passed
1589
Passed By
1379
Net Change
+210
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19384
5K → 10K292363-71#19384#19455
10K → 15K238142+96#19455#19359
15K → 20K22390+133#19359#19226
20K → Half1831-13#19226#19239
Half → 25K14990+59#19239#19180
25K → 30K26191+170#19180#19010
30K → 20M8667+19#19010#18991
20M → 21M8169+12#18991#18979
21M → 35K4154-13#18979#18992
35K → 23M8561+24#18992#18968
23M → 24M4496-52#18968#19020
24M → 40K3675-39#19020#19059
40K → 25.2M1156-45#19059#19104
25.2M → Finish2494-70#19104#19174
TOTALS15891379+210
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing