Boston Marathon logo
BOSTON MARATHON 2023

Aaron Foster

Bib: 8142•M

ON

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 9%
Gender (Male)
#0 / 15176
Top 16%
Masters (Masters Men)
#0 / 9891
Top 5%
Division (M40-44)
#0 / 2241
Top 15%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:37
Rank: #3117
Start → 5K
20:37 | 6:38/mi
10K· 6.21 mi
41:00
Rank: #3143 (-26)
5K → 10K
20:23 | 6:34/mi
15K· 9.32 mi
1:01:35
Rank: #3246 (-103)
10K → 15K
20:35 | 6:38/mi
20K· 12.43 mi
1:22:15
Rank: #3196 (+50)
15K → 20K
20:40 | 6:39/mi
Half· 13.11 mi
1:26:41
Rank: #3165 (+31)
20K → Half
4:26 | 6:30/mi
25K· 15.53 mi
1:42:45
Rank: #3095 (+70)
Half → 25K
16:04 | 6:38/mi
30K· 18.64 mi
2:03:52
Rank: #3004 (+91)
25K → 30K
21:07 | 6:48/mi
20M
2:13:02
Rank: #2940 (+64)
30K → 20M
9:10 | 6:45/mi
21M
2:19:57
Rank: #2842 (+98)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:24:50
Rank: #2811 (+31)
21M → 35K
4:53 | 6:32/mi
23M
2:33:04
Rank: #2685 (+126)
35K → 23M
8:14 | 6:35/mi
24M
2:39:40
Rank: #2652 (+33)
23M → 24M
6:36 | 6:36/mi
40K· 24.85 mi
2:45:21
Rank: #2615 (+37)
24M → 40K
5:41 | 6:39/mi
25.2M
2:47:39
Rank: #2558 (+57)
40K → 25.2M
2:18 | 6:39/mi
Finish· 26.22 mi
2:54:06
Rank: #2493 (+65)
25.2M → Finish
6:27 | 6:20/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⚖️ Balanced
Distance13.11 mi
Time1:26:41
Pace6:37 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:27:25
Pace6:40 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:5120:376:3820:37
6:38
-
10K
6.21 mi11:06:1441:006:3620:23
6:34
-0:04
15K
9.32 mi11:26:491:01:356:3620:35
6:38
+0:04
20K
12.43 mi11:47:291:22:156:3720:40
6:39
+0:01
Half
13.11 mi11:51:551:26:416:374:26
6:30
-0:09
25K
15.53 mi12:07:591:42:456:3716:04
6:38
+0:08
30K
18.64 mi12:29:062:03:526:3921:07
6:48
+0:10
20M
20.00 mi12:38:162:13:026:399:10
6:45
-0:03
21M
21.00 mi12:45:112:19:576:406:55
6:55
+0:10
35K
21.75 mi12:50:042:24:506:404:53
6:32
-0:23
23M
23.00 mi12:58:182:33:046:398:14
6:35
+0:03
24M
24.00 mi13:04:542:39:406:396:36
6:36
+0:01
40K
24.85 mi13:10:352:45:216:395:41
6:39
+0:03
25.2M
25.20 mi13:12:532:47:396:392:18
6:39
0:00
Finish
26.22 mi13:19:202:54:066:396:27
6:20
-0:19

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

6:20 /mi

Average Pace

6:39 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:54

79% of race

Time at Steady Pace

37:12

21% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:38 /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 mi10:45:5120:376:3820:37
6:38
#3117
10K
6.21 mi11:06:1441:006:3620:23
6:34
#3143
15K
9.32 mi11:26:491:01:356:3620:35
6:38
#3246
20K
12.43 mi11:47:291:22:156:3720:40
6:39
#3196
Half
13.11 mi11:51:551:26:416:374:26
6:30
#3165
25K
15.53 mi12:07:591:42:456:3716:04
6:38
#3095
30K
18.64 mi12:29:062:03:526:3921:07
6:48
#3004
20M
20.00 mi12:38:162:13:026:399:10
6:45
#2940
21M
21.00 mi12:45:112:19:576:406:55
6:55
#2842
35K
21.75 mi12:50:042:24:506:404:53
6:32
#2811
23M
23.00 mi12:58:182:33:046:398:14
6:35
#2685
24M
24.00 mi13:04:542:39:406:396:36
6:36
#2652
40K
24.85 mi13:10:352:45:216:395:41
6:39
#2615
25.2M
25.20 mi13:12:532:47:396:392:18
6:39
#2558
Finish
26.22 mi13:19:202:54:066:396:27
6:20
#2493
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3117294529453483(Top 13%)3297(Top 22%)3297(Top 147%)
10K6.21 mi3.10 mi3143-262984-392984-393195(Top 12%)3044(Top 20%)3044(Top 136%)
15K9.32 mi3.11 mi3246-1033085-1013085-1013483(Top 13%)3297(Top 22%)3297(Top 147%)
20K12.43 mi3.11 mi3196+503042+433042+433184(Top 12%)3025(Top 20%)3025(Top 135%)
Half13.11 mi0.68 mi3165+313015+273015+272754(Top 10%)2638(Top 17%)2638(Top 118%)
25K15.53 mi2.42 mi3095+702950+652950+652848(Top 11%)2719(Top 18%)2719(Top 121%)
30K18.64 mi3.11 mi3004+912864+862864+862950(Top 11%)2792(Top 18%)2792(Top 125%)
20M20.00 mi1.36 mi2940+642806+582806+582500(Top 9%)2371(Top 16%)2371(Top 106%)
21M21.00 mi1.00 mi2842+982716+902716+901831(Top 7%)1743(Top 11%)1743(Top 78%)
35K21.75 mi0.75 mi2811+312686+302686+302554(Top 10%)2413(Top 16%)2413(Top 108%)
23M23.00 mi1.25 mi2685+1262566+1202566+1201705(Top 6%)1619(Top 11%)1619(Top 72%)
24M24.00 mi1.00 mi2652+332531+352531+352549(Top 10%)2377(Top 16%)2377(Top 106%)
40K24.85 mi0.85 mi2615+372496+352496+352151(Top 8%)2002(Top 13%)2002(Top 89%)
25.2M25.20 mi0.35 mi2558+572442+542442+54765(Top 3%)726(Top 5%)726(Top 32%)
Finish26.22 mi1.02 mi2493+652380+622380+621744(Top 7%)1640(Top 11%)1640(Top 73%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3483

Males

3297

M40-44

3297

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3195

Males

3044

M40-44

3044

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3483

Males

3297

M40-44

3297

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3184

Males

3025

M40-44

3025

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2754

Males

2638

M40-44

2638

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

2848

Males

2719

M40-44

2719

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

2950

Males

2792

M40-44

2792

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2500

Males

2371

M40-44

2371

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1831

Males

1743

M40-44

1743

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2554

Males

2413

M40-44

2413

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1705

Males

1619

M40-44

1619

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2549

Males

2377

M40-44

2377

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2151

Males

2002

M40-44

2002

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

765

Males

726

M40-44

726

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1744

Males

1640

M40-44

1640

Passing Analysis

Category:
Athletes Passed
1180
Passed By
556
Net Change
+624
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3117
5K → 10K142168-26#3117#3143
10K → 15K51154-103#3143#3246
15K → 20K10858+50#3246#3196
20K → Half409+31#3196#3165
Half → 25K9525+70#3165#3095
25K → 30K13443+91#3095#3004
30K → 20M8016+64#3004#2940
20M → 21M1035+98#2940#2842
21M → 35K4615+31#2842#2811
35K → 23M1315+126#2811#2685
23M → 24M6330+33#2685#2652
24M → 40K5417+37#2652#2615
40K → 25.2M581+57#2615#2558
25.2M → Finish7510+65#2558#2493
TOTALS1180556+624
📊

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