Boston Marathon logo
BOSTON MARATHON 2023

James Senior

Bib: 5965•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 18%
Division (M18-39)
#0 / 5285
Top 38%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:19
Rank: #5211
Start → 5K
21:19 | 6:52/mi
10K· 6.21 mi
41:56
Rank: #4453 (+758)
5K → 10K
20:37 | 6:38/mi
15K· 9.32 mi
1:02:36
Rank: #4167 (+286)
10K → 15K
20:40 | 6:39/mi
20K· 12.43 mi
1:23:15
Rank: #3851 (+316)
15K → 20K
20:39 | 6:39/mi
Half· 13.11 mi
1:27:40
Rank: #3755 (+96)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:43:54
Rank: #3665 (+90)
Half → 25K
16:14 | 6:42/mi
30K· 18.64 mi
2:04:56
Rank: #3447 (+218)
25K → 30K
21:02 | 6:46/mi
20M
2:14:05
Rank: #3315 (+132)
30K → 20M
9:09 | 6:44/mi
21M
2:20:57
Rank: #3171 (+144)
20M → 21M
6:52 | 6:52/mi
35K· 21.75 mi
2:25:47
Rank: #3112 (+59)
21M → 35K
4:50 | 6:28/mi
23M
2:34:14
Rank: #3036 (+76)
35K → 23M
8:27 | 6:45/mi
24M
2:40:48
Rank: #2970 (+66)
23M → 24M
6:34 | 6:34/mi
40K· 24.85 mi
2:46:31
Rank: #2918 (+52)
24M → 40K
5:43 | 6:41/mi
25.2M
2:48:57
Rank: #2875 (+43)
40K → 25.2M
2:26 | 7:03/mi
Finish· 26.22 mi
2:55:30
Rank: #2816 (+59)
25.2M → Finish
6:33 | 6:26/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
Time1:27:40
Pace6:41 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:27:50
Pace6:42 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:5021:196:5221:19
6:52
-
10K
6.21 mi10:44:2741:566:4520:37
6:38
-0:14
15K
9.32 mi11:05:071:02:366:4320:40
6:39
+0:01
20K
12.43 mi11:25:461:23:156:4220:39
6:39
0:00
Half
13.11 mi11:30:111:27:406:414:25
6:28
-0:11
25K
15.53 mi11:46:251:43:546:4116:14
6:42
+0:14
30K
18.64 mi12:07:272:04:566:4221:02
6:46
+0:04
20M
20.00 mi12:16:362:14:056:429:09
6:44
-0:02
21M
21.00 mi12:23:282:20:576:436:52
6:52
+0:08
35K
21.75 mi12:28:182:25:476:424:50
6:28
-0:24
23M
23.00 mi12:36:452:34:146:428:27
6:45
+0:17
24M
24.00 mi12:43:192:40:486:426:34
6:34
-0:11
40K
24.85 mi12:49:022:46:316:425:43
6:41
+0:07
25.2M
25.20 mi12:51:282:48:576:422:26
7:03
+0:22
Finish
26.22 mi12:58:012:55:306:426:33
6:26
-0:37

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

6:26 /mi

Average Pace

6:42 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:51

71% of race

Time at Steady Pace

51:39

29% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:42 /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 mi10:23:5021:196:5221:19
6:52
#5211
10K
6.21 mi10:44:2741:566:4520:37
6:38
#4453
15K
9.32 mi11:05:071:02:366:4320:40
6:39
#4167
20K
12.43 mi11:25:461:23:156:4220:39
6:39
#3851
Half
13.11 mi11:30:111:27:406:414:25
6:28
#3755
25K
15.53 mi11:46:251:43:546:4116:14
6:42
#3665
30K
18.64 mi12:07:272:04:566:4221:02
6:46
#3447
20M
20.00 mi12:16:362:14:056:429:09
6:44
#3315
21M
21.00 mi12:23:282:20:576:436:52
6:52
#3171
35K
21.75 mi12:28:182:25:476:424:50
6:28
#3112
23M
23.00 mi12:36:452:34:146:428:27
6:45
#3036
24M
24.00 mi12:43:192:40:486:426:34
6:34
#2970
40K
24.85 mi12:49:022:46:316:425:43
6:41
#2918
25.2M
25.20 mi12:51:282:48:576:422:26
7:03
#2875
Finish
26.22 mi12:58:012:55:306:426:33
6:26
#2816
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5211482548253692(Top 14%)3480(Top 23%)3480(Top 66%)
10K6.21 mi3.10 mi4453+7584164+6614164+6613753(Top 14%)3540(Top 23%)3540(Top 67%)
15K9.32 mi3.11 mi4167+2863911+2533911+2533692(Top 14%)3480(Top 23%)3480(Top 66%)
20K12.43 mi3.11 mi3851+3163634+2773634+2773143(Top 12%)2989(Top 20%)2989(Top 57%)
Half13.11 mi0.68 mi3755+963549+853549+852628(Top 10%)2522(Top 17%)2522(Top 48%)
25K15.53 mi2.42 mi3665+903464+853464+853313(Top 12%)3145(Top 21%)3145(Top 60%)
30K18.64 mi3.11 mi3447+2183264+2003264+2002796(Top 11%)2652(Top 17%)2652(Top 50%)
20M20.00 mi1.36 mi3315+1323141+1233141+1232445(Top 9%)2320(Top 15%)2320(Top 44%)
21M21.00 mi1.00 mi3171+1443008+1333008+1331660(Top 6%)1581(Top 10%)1581(Top 30%)
35K21.75 mi0.75 mi3112+592954+542954+542249(Top 8%)2136(Top 14%)2136(Top 40%)
23M23.00 mi1.25 mi3036+762885+692885+692387(Top 9%)2244(Top 15%)2244(Top 42%)
24M24.00 mi1.00 mi2970+662822+632822+632389(Top 9%)2232(Top 15%)2232(Top 42%)
40K24.85 mi0.85 mi2918+522772+502772+502287(Top 9%)2125(Top 14%)2125(Top 40%)
25.2M25.20 mi0.35 mi2875+432732+402732+401938(Top 7%)1821(Top 12%)1821(Top 34%)
Finish26.22 mi1.02 mi2816+592675+572675+572133(Top 8%)1978(Top 13%)1978(Top 37%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

3692

Males

3480

M18-39

3480

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3753

Males

3540

M18-39

3540

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

3692

Males

3480

M18-39

3480

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3143

Males

2989

M18-39

2989

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2628

Males

2522

M18-39

2522

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3313

Males

3145

M18-39

3145

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

2796

Males

2652

M18-39

2652

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2445

Males

2320

M18-39

2320

20M→21M

20.0 - 21.0 mi

Top 6%
×8stories
+106ft-24ft

Overall

1660

Males

1581

M18-39

1581

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2249

Males

2136

M18-39

2136

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2387

Males

2244

M18-39

2244

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2389

Males

2232

M18-39

2232

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2287

Males

2125

M18-39

2125

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1938

Males

1821

M18-39

1821

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2133

Males

1978

M18-39

1978

Passing Analysis

Category:
Athletes Passed
2574
Passed By
179
Net Change
+2395
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5211
5K → 10K77517+758#5211#4453
10K → 15K31630+286#4453#4167
15K → 20K3248+316#4167#3851
20K → Half960+96#3851#3755
Half → 25K13040+90#3755#3665
25K → 30K23719+218#3665#3447
30K → 20M1375+132#3447#3315
20M → 21M1440+144#3315#3171
21M → 35K645+59#3171#3112
35K → 23M8913+76#3112#3036
23M → 24M7812+66#3036#2970
24M → 40K6917+52#2970#2918
40K → 25.2M463+43#2918#2875
25.2M → Finish6910+59#2875#2816
TOTALS2574179+2395
📊

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