Boston Marathon logo
BOSTON MARATHON 2023

Brian Thorn

Bib: 5309•M

IA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 9%
Gender (Male)
#0 / 15176
Top 15%
Division (M18-39)
#0 / 5285
Top 34%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:02
Rank: #4340
Start → 5K
21:02 | 6:46/mi
10K· 6.21 mi
41:36
Rank: #3908 (+432)
5K → 10K
20:34 | 6:37/mi
15K· 9.32 mi
1:02:24
Rank: #3964 (-56)
10K → 15K
20:48 | 6:42/mi
20K· 12.43 mi
1:22:59
Rank: #3661 (+303)
15K → 20K
20:35 | 6:38/mi
Half· 13.11 mi
1:27:28
Rank: #3634 (+27)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:43:28
Rank: #3422 (+212)
Half → 25K
16:00 | 6:36/mi
30K· 18.64 mi
2:04:08
Rank: #3105 (+317)
25K → 30K
20:40 | 6:39/mi
20M
2:13:06
Rank: #2968 (+137)
30K → 20M
8:58 | 6:36/mi
21M
2:19:54
Rank: #2827 (+141)
20M → 21M
6:48 | 6:48/mi
35K· 21.75 mi
2:24:42
Rank: #2768 (+59)
21M → 35K
4:48 | 6:25/mi
23M
2:32:58
Rank: #2652 (+116)
35K → 23M
8:16 | 6:36/mi
24M
2:39:28
Rank: #2595 (+57)
23M → 24M
6:30 | 6:30/mi
40K· 24.85 mi
2:45:07
Rank: #2555 (+40)
24M → 40K
5:39 | 6:36/mi
25.2M
2:47:30
Rank: #2521 (+34)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:53:52
Rank: #2441 (+80)
25.2M → Finish
6:22 | 6:15/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
Distance13.11 mi
Time1:27:28
Pace6:40 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:26:24
Pace6:35 /mi
📊Negative Split: 1.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:0821:026:4621:02
6:46
-
10K
6.21 mi10:44:4241:366:4220:34
6:37
-0:09
15K
9.32 mi11:05:301:02:246:4220:48
6:42
+0:05
20K
12.43 mi11:26:051:22:596:4120:35
6:38
-0:04
Half
13.11 mi11:30:341:27:286:404:29
6:34
-0:04
25K
15.53 mi11:46:341:43:286:4016:00
6:36
+0:02
30K
18.64 mi12:07:142:04:086:4020:40
6:39
+0:03
20M
20.00 mi12:16:122:13:066:398:58
6:36
-0:03
21M
21.00 mi12:23:002:19:546:406:48
6:48
+0:12
35K
21.75 mi12:27:482:24:426:394:48
6:25
-0:23
23M
23.00 mi12:36:042:32:586:398:16
6:36
+0:11
24M
24.00 mi12:42:342:39:286:396:30
6:30
-0:06
40K
24.85 mi12:48:132:45:076:395:39
6:36
+0:06
25.2M
25.20 mi12:50:362:47:306:392:23
6:55
+0:19
Finish
26.22 mi12:56:582:53:526:386:22
6:15
-0:40

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

6:15 /mi

Average Pace

6:38 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:51:29

99% of race

Time at Steady Pace

2:23

1% 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 mi10:24:0821:026:4621:02
6:46
#4340
10K
6.21 mi10:44:4241:366:4220:34
6:37
#3908
15K
9.32 mi11:05:301:02:246:4220:48
6:42
#3964
20K
12.43 mi11:26:051:22:596:4120:35
6:38
#3661
Half
13.11 mi11:30:341:27:286:404:29
6:34
#3634
25K
15.53 mi11:46:341:43:286:4016:00
6:36
#3422
30K
18.64 mi12:07:142:04:086:4020:40
6:39
#3105
20M
20.00 mi12:16:122:13:066:398:58
6:36
#2968
21M
21.00 mi12:23:002:19:546:406:48
6:48
#2827
35K
21.75 mi12:27:482:24:426:394:48
6:25
#2768
23M
23.00 mi12:36:042:32:586:398:16
6:36
#2652
24M
24.00 mi12:42:342:39:286:396:30
6:30
#2595
40K
24.85 mi12:48:132:45:076:395:39
6:36
#2555
25.2M
25.20 mi12:50:362:47:306:392:23
6:55
#2521
Finish
26.22 mi12:56:582:53:526:386:22
6:15
#2441
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4340405140514056(Top 15%)3805(Top 25%)3805(Top 72%)
10K6.21 mi3.10 mi3908+4323678+3733678+3733621(Top 14%)3418(Top 23%)3418(Top 65%)
15K9.32 mi3.11 mi3964-563731-533731-534056(Top 15%)3805(Top 25%)3805(Top 72%)
20K12.43 mi3.11 mi3661+3033464+2673464+2672995(Top 11%)2851(Top 19%)2851(Top 54%)
Half13.11 mi0.68 mi3634+273439+253439+253170(Top 12%)3020(Top 20%)3020(Top 57%)
25K15.53 mi2.42 mi3422+2123251+1883251+1882687(Top 10%)2571(Top 17%)2571(Top 49%)
30K18.64 mi3.11 mi3105+3172956+2952956+2952183(Top 8%)2084(Top 14%)2084(Top 39%)
20M20.00 mi1.36 mi2968+1372833+1232833+1231864(Top 7%)1777(Top 12%)1777(Top 34%)
21M21.00 mi1.00 mi2827+1412701+1322701+1321421(Top 5%)1355(Top 9%)1355(Top 26%)
35K21.75 mi0.75 mi2768+592646+552646+552038(Top 8%)1936(Top 13%)1936(Top 37%)
23M23.00 mi1.25 mi2652+1162535+1112535+1111784(Top 7%)1693(Top 11%)1693(Top 32%)
24M24.00 mi1.00 mi2595+572480+552480+552087(Top 8%)1957(Top 13%)1957(Top 37%)
40K24.85 mi0.85 mi2555+402439+412439+411948(Top 7%)1830(Top 12%)1830(Top 35%)
25.2M25.20 mi0.35 mi2521+342405+342405+341485(Top 6%)1402(Top 9%)1402(Top 27%)
Finish26.22 mi1.02 mi2441+802332+732332+731440(Top 5%)1363(Top 9%)1363(Top 26%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

4056

Males

3805

M18-39

3805

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3621

Males

3418

M18-39

3418

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

4056

Males

3805

M18-39

3805

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

2995

Males

2851

M18-39

2851

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3170

Males

3020

M18-39

3020

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2687

Males

2571

M18-39

2571

25K→30K

15.5 - 18.6 mi

Top 8%
×9stories
+181ft-148ft

Overall

2183

Males

2084

M18-39

2084

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1864

Males

1777

M18-39

1777

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1421

Males

1355

M18-39

1355

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2038

Males

1936

M18-39

1936

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1784

Males

1693

M18-39

1693

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2087

Males

1957

M18-39

1957

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1948

Males

1830

M18-39

1830

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1485

Males

1402

M18-39

1402

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1440

Males

1363

M18-39

1363

Passing Analysis

Category:
Athletes Passed
2211
Passed By
312
Net Change
+1899
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4340
5K → 10K50775+432#4340#3908
10K → 15K97153-56#3908#3964
15K → 20K31310+303#3964#3661
20K → Half358+27#3661#3634
Half → 25K2153+212#3634#3422
25K → 30K3203+317#3422#3105
30K → 20M1381+137#3105#2968
20M → 21M1410+141#2968#2827
21M → 35K656+59#2827#2768
35K → 23M1226+116#2768#2652
23M → 24M7619+57#2652#2595
24M → 40K5313+40#2595#2555
40K → 25.2M406+34#2555#2521
25.2M → Finish899+80#2521#2441
TOTALS2211312+1899
📊

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