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BOSTON MARATHON 2025

Derryn Bronstein

Bib: 28565•M

NJ

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 25%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:49
Rank: #5454
Start → 5K
20:49 | 6:42/mi
10K· 6.21 mi
41:37
Rank: #5337 (+117)
5K → 10K
20:48 | 6:42/mi
15K· 9.32 mi
1:02:53
Rank: #5669 (-332)
10K → 15K
21:16 | 6:51/mi
20K· 12.43 mi
1:23:42
Rank: #5323 (+346)
15K → 20K
20:49 | 6:42/mi
Half· 13.11 mi
1:28:08
Rank: #5196 (+127)
20K → Half
4:26 | 6:30/mi
25K· 15.53 mi
1:44:25
Rank: #4987 (+209)
Half → 25K
16:17 | 6:43/mi
30K· 18.64 mi
2:05:53
Rank: #4776 (+211)
25K → 30K
21:28 | 6:55/mi
20M
2:15:07
Rank: #4567 (+209)
30K → 20M
9:14 | 6:48/mi
21M
2:22:19
Rank: #4432 (+135)
20M → 21M
7:12 | 7:12/mi
35K· 21.75 mi
2:27:28
Rank: #4407 (+25)
21M → 35K
5:09 | 6:53/mi
23M
2:36:07
Rank: #4283 (+124)
35K → 23M
8:39 | 6:55/mi
24M
2:43:02
Rank: #4252 (+31)
23M → 24M
6:55 | 6:55/mi
40K· 24.85 mi
2:49:11
Rank: #4273 (-21)
24M → 40K
6:09 | 7:12/mi
25.2M
2:51:55
Rank: #4292 (-19)
40K → 25.2M
2:44 | 7:56/mi
Finish· 26.22 mi
2:58:53
Rank: #4305 (-13)
25.2M → Finish
6:58 | 6:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:08
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:30:45
Pace6:55 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:37:2720:496:4220:49
6:42
-
10K
6.21 mi11:58:1541:376:4220:48
6:42
0:00
15K
9.32 mi12:19:311:02:536:4521:16
6:51
+0:09
20K
12.43 mi12:40:201:23:426:4420:49
6:42
-0:09
Half
13.11 mi12:44:461:28:086:434:26
6:30
-0:12
25K
15.53 mi13:01:031:44:256:4316:17
6:43
+0:13
30K
18.64 mi13:22:312:05:536:4521:28
6:55
+0:12
20M
20.00 mi13:31:452:15:076:459:14
6:48
-0:07
21M
21.00 mi13:38:572:22:196:477:12
7:12
+0:24
35K
21.75 mi13:44:062:27:286:475:09
6:53
-0:19
23M
23.00 mi13:52:452:36:076:478:39
6:55
+0:02
24M
24.00 mi13:59:402:43:026:486:55
6:55
0:00
40K
24.85 mi14:05:492:49:116:486:09
7:12
+0:17
25.2M
25.20 mi14:08:332:51:556:492:44
7:56
+0:44
Finish
26.22 mi14:15:312:58:536:506:58
6:50
-1:06

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

6:30 /mi

Average Pace

6:50 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:26

2% of race

Time at Steady Pace

2:38:22

89% of race

Time at Slower Pace

16:05

9% of race

Average Pace: 6:49 /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 mi11:37:2720:496:4220:49
6:42
#5454
10K
6.21 mi11:58:1541:376:4220:48
6:42
#5337
15K
9.32 mi12:19:311:02:536:4521:16
6:51
#5669
20K
12.43 mi12:40:201:23:426:4420:49
6:42
#5323
Half
13.11 mi12:44:461:28:086:434:26
6:30
#5196
25K
15.53 mi13:01:031:44:256:4316:17
6:43
#4987
30K
18.64 mi13:22:312:05:536:4521:28
6:55
#4776
20M
20.00 mi13:31:452:15:076:459:14
6:48
#4567
21M
21.00 mi13:38:572:22:196:477:12
7:12
#4432
35K
21.75 mi13:44:062:27:286:475:09
6:53
#4407
23M
23.00 mi13:52:452:36:076:478:39
6:55
#4283
24M
24.00 mi13:59:402:43:026:486:55
6:55
#4252
40K
24.85 mi14:05:492:49:116:486:09
7:12
#4273
25.2M
25.20 mi14:08:332:51:556:492:44
7:56
#4292
Finish
26.22 mi14:15:312:58:536:506:58
6:50
#4305
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5454506450646518(Top 23%)5880(Top 37%)5880(Top 104%)
10K6.21 mi3.10 mi5337+1174948+1164948+1165301(Top 19%)4913(Top 31%)4913(Top 87%)
15K9.32 mi3.11 mi5669-3325224-2765224-2766518(Top 23%)5880(Top 37%)5880(Top 104%)
20K12.43 mi3.11 mi5323+3464926+2984926+2984446(Top 16%)4150(Top 26%)4150(Top 74%)
Half13.11 mi0.68 mi5196+1274819+1074819+1073709(Top 13%)3509(Top 22%)3509(Top 62%)
25K15.53 mi2.42 mi4987+2094627+1924627+1924261(Top 15%)3957(Top 25%)3957(Top 70%)
30K18.64 mi3.11 mi4776+2114422+2054422+2054140(Top 15%)3807(Top 24%)3807(Top 67%)
20M20.00 mi1.36 mi4567+2094238+1844238+1842916(Top 10%)2725(Top 17%)2725(Top 48%)
21M21.00 mi1.00 mi4432+1354114+1244114+1243161(Top 11%)2918(Top 18%)2918(Top 52%)
35K21.75 mi0.75 mi4407+254088+264088+264629(Top 16%)4107(Top 26%)4107(Top 73%)
23M23.00 mi1.25 mi4283+1243976+1123976+1123275(Top 12%)2986(Top 19%)2986(Top 53%)
24M24.00 mi1.00 mi4252+313933+433933+434182(Top 15%)3683(Top 23%)3683(Top 65%)
40K24.85 mi0.85 mi4273-213943-103943-105007(Top 18%)4217(Top 26%)4217(Top 75%)
25.2M25.20 mi0.35 mi4292-193956-133956-135548(Top 20%)4466(Top 28%)4466(Top 79%)
Finish26.22 mi1.02 mi4305-133960-43960-44714(Top 17%)3938(Top 24%)3938(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6518

Males

5880

M18-39

5880

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5301

Males

4913

M18-39

4913

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6518

Males

5880

M18-39

5880

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4446

Males

4150

M18-39

4150

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3709

Males

3509

M18-39

3509

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4261

Males

3957

M18-39

3957

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4140

Males

3807

M18-39

3807

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2916

Males

2725

M18-39

2725

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3161

Males

2918

M18-39

2918

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4629

Males

4107

M18-39

4107

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3275

Males

2986

M18-39

2986

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4182

Males

3683

M18-39

3683

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

5007

Males

4217

M18-39

4217

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5548

Males

4466

M18-39

4466

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2stories
+22ft-21ft

Overall

4714

Males

3938

M18-39

3938

Passing Analysis

Category:
Athletes Passed
1986
Passed By
837
Net Change
+1149
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5454
5K → 10K249132+117#5454#5337
10K → 15K43375-332#5337#5669
15K → 20K3548+346#5669#5323
20K → Half1281+127#5323#5196
Half → 25K22718+209#5196#4987
25K → 30K26756+211#4987#4776
30K → 20M2112+209#4776#4567
20M → 21M14712+135#4567#4432
21M → 35K5530+25#4432#4407
35K → 23M13814+124#4407#4283
23M → 24M7140+31#4283#4252
24M → 40K3657-21#4252#4273
40K → 25.2M1736-19#4273#4292
25.2M → Finish4356-13#4292#4305
TOTALS1986837+1149
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing