Boston Marathon logo
BOSTON MARATHON 2023

Henry Brosch

Bib: 5869•M

OH

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 42%
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:33
Rank: #5852
Start → 5K
21:33 | 6:56/mi
10K· 6.21 mi
44:12
Rank: #7192 (-1340)
5K → 10K
22:39 | 7:17/mi
15K· 9.32 mi
1:07:34
Rank: #8104 (-912)
10K → 15K
23:22 | 7:31/mi
20K· 12.43 mi
1:31:04
Rank: #8449 (-345)
15K → 20K
23:30 | 7:34/mi
Half· 13.11 mi
1:36:04
Rank: #8471 (-22)
20K → Half
5:00 | 7:20/mi
25K· 15.53 mi
1:54:47
Rank: #8750 (-279)
Half → 25K
18:43 | 7:43/mi
30K· 18.64 mi
2:20:25
Rank: #9421 (-671)
25K → 30K
25:38 | 8:15/mi
20M
2:32:22
Rank: #9883 (-462)
30K → 20M
11:57 | 8:48/mi
21M
2:41:23
Rank: #10096 (-213)
20M → 21M
9:01 | 9:01/mi
35K· 21.75 mi
2:47:06
Rank: #10054 (+42)
21M → 35K
5:43 | 7:38/mi
23M
2:58:28
Rank: #10473 (-419)
35K → 23M
11:22 | 9:05/mi
24M
3:07:18
Rank: #10770 (-297)
23M → 24M
8:50 | 8:50/mi
40K· 24.85 mi
3:15:14
Rank: #11070 (-300)
24M → 40K
7:56 | 9:17/mi
25.2M
3:18:37
Rank: #11184 (-114)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
3:26:47
Rank: #11222 (-38)
25.2M → Finish
8:10 | 8:01/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
Time1:36:04
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:50:43
Pace8:27 /mi
📊Positive Split: 15.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3021:336:5621:33
6:56
-
10K
6.21 mi10:47:0944:127:0722:39
7:17
+0:21
15K
9.32 mi11:10:311:07:347:1523:22
7:31
+0:14
20K
12.43 mi11:34:011:31:047:2023:30
7:34
+0:03
Half
13.11 mi11:39:011:36:047:205:00
7:20
-0:14
25K
15.53 mi11:57:441:54:477:2318:43
7:43
+0:23
30K
18.64 mi12:23:222:20:257:3225:38
8:15
+0:32
20M
20.00 mi12:35:192:32:227:3711:57
8:48
+0:33
21M
21.00 mi12:44:202:41:237:419:01
9:01
+0:13
35K
21.75 mi12:50:032:47:067:415:43
7:38
-1:23
23M
23.00 mi13:01:252:58:287:4611:22
9:05
+1:27
24M
24.00 mi13:10:153:07:187:488:50
8:50
-0:15
40K
24.85 mi13:18:113:15:147:517:56
9:17
+0:27
25.2M
25.20 mi13:21:343:18:377:533:23
9:49
+0:32
Finish
26.22 mi13:29:443:26:477:548:10
8:01
-1:48

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

6:56 /mi

Average Pace

7:54 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:04

46% of race

Time at Steady Pace

58:14

28% of race

Time at Slower Pace

52:29

25% of race

Average Pace: 7:53 /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 mi10:24:3021:336:5621:33
6:56
#5852
10K
6.21 mi10:47:0944:127:0722:39
7:17
#7192
15K
9.32 mi11:10:311:07:347:1523:22
7:31
#8104
20K
12.43 mi11:34:011:31:047:2023:30
7:34
#8449
Half
13.11 mi11:39:011:36:047:205:00
7:20
#8471
25K
15.53 mi11:57:441:54:477:2318:43
7:43
#8750
30K
18.64 mi12:23:222:20:257:3225:38
8:15
#9421
20M
20.00 mi12:35:192:32:227:3711:57
8:48
#9883
21M
21.00 mi12:44:202:41:237:419:01
9:01
#10096
35K
21.75 mi12:50:032:47:067:415:43
7:38
#10054
23M
23.00 mi13:01:252:58:287:4611:22
9:05
#10473
24M
24.00 mi13:10:153:07:187:488:50
8:50
#10770
40K
24.85 mi13:18:113:15:147:517:56
9:17
#11070
25.2M
25.20 mi13:21:343:18:377:533:23
9:49
#11184
Finish
26.22 mi13:29:443:26:477:548:10
8:01
#11222
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi58525368536810345(Top 39%)8329(Top 55%)8329(Top 158%)
10K6.21 mi3.10 mi7192-13406400-10326400-10328801(Top 33%)7456(Top 49%)7456(Top 141%)
15K9.32 mi3.11 mi8104-9127020-6207020-62010345(Top 39%)8329(Top 55%)8329(Top 158%)
20K12.43 mi3.11 mi8449-3457223-2037223-2039810(Top 37%)7971(Top 53%)7971(Top 151%)
Half13.11 mi0.68 mi8471-227235-127235-128830(Top 33%)7421(Top 49%)7421(Top 140%)
25K15.53 mi2.42 mi8750-2797386-1517386-15110446(Top 39%)8230(Top 54%)8230(Top 156%)
30K18.64 mi3.11 mi9421-6717752-3667752-36612674(Top 48%)9086(Top 60%)9086(Top 172%)
20M20.00 mi1.36 mi9883-4628002-2508002-25015362(Top 58%)10139(Top 67%)10139(Top 192%)
21M21.00 mi1.00 mi10096-2138096-948096-9413469(Top 51%)9247(Top 61%)9247(Top 175%)
35K21.75 mi0.75 mi10054+428048+488048+489553(Top 36%)7390(Top 49%)7390(Top 140%)
23M23.00 mi1.25 mi10473-4198224-1768224-17616415(Top 62%)10411(Top 69%)10411(Top 197%)
24M24.00 mi1.00 mi10770-2978350-1268350-12616356(Top 61%)10325(Top 68%)10325(Top 195%)
40K24.85 mi0.85 mi11070-3008469-1198469-11917397(Top 65%)10746(Top 71%)10746(Top 203%)
25.2M25.20 mi0.35 mi11184-1148509-408509-4016494(Top 62%)10306(Top 68%)10306(Top 195%)
Finish26.22 mi1.02 mi11222-388503+68503+612200(Top 46%)8375(Top 55%)8375(Top 158%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21stories
+97ft-345ft

Overall

10345

Males

8329

M18-39

8329

5K→10K

3.1 - 6.2 mi

Top 33%
×5stories
+79ft-138ft

Overall

8801

Males

7456

M18-39

7456

10K→15K

6.2 - 9.3 mi

Top 39%
×3stories
+67ft-78ft

Overall

10345

Males

8329

M18-39

8329

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9810

Males

7971

M18-39

7971

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

8830

Males

7421

M18-39

7421

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

10446

Males

8230

M18-39

8230

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

12674

Males

9086

M18-39

9086

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

15362

Males

10139

M18-39

10139

20M→21M

20.0 - 21.0 mi

Top 51%
×8stories
+106ft-24ft

Overall

13469

Males

9247

M18-39

9247

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

9553

Males

7390

M18-39

7390

35K→23M

21.8 - 23.0 mi

Top 62%
×5stories
+23ft-63ft

Overall

16415

Males

10411

M18-39

10411

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

16356

Males

10325

M18-39

10325

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17397

Males

10746

M18-39

10746

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16494

Males

10306

M18-39

10306

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

12200

Males

8375

M18-39

8375

Passing Analysis

Category:
Athletes Passed
409
Passed By
5777
Net Change
-5370
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5852
5K → 10K21342-1340#5852#7192
10K → 15K8920-912#7192#8104
15K → 20K54399-345#8104#8449
20K → Half1436-22#8449#8471
Half → 25K38317-279#8471#8750
25K → 30K47718-671#8750#9421
30K → 20M18480-462#9421#9883
20M → 21M33244-213#9883#10096
21M → 35K7331+42#10096#10054
35K → 23M24443-419#10054#10473
23M → 24M16313-297#10473#10770
24M → 40K18318-300#10770#11070
40K → 25.2M10124-114#11070#11184
25.2M → Finish5492-38#11184#11222
TOTALS4095777-5370
📊

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