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BOSTON MARATHON 2025

Dan Rosenzweig-Ziff

Bib: 27997•M

DC

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
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
27:35
Rank: #21888
Start → 5K
27:35 | 8:53/mi
10K· 6.21 mi
54:50
Rank: #21573 (+315)
5K → 10K
27:15 | 8:46/mi
15K· 9.32 mi
1:21:21
Rank: #20897 (+676)
10K → 15K
26:31 | 8:32/mi
20K· 12.43 mi
1:47:32
Rank: #20145 (+752)
15K → 20K
26:11 | 8:26/mi
Half· 13.11 mi
1:53:25
Rank: #20123 (+22)
20K → Half
5:53 | 8:37/mi
25K· 15.53 mi
2:14:46
Rank: #19918 (+205)
Half → 25K
21:21 | 8:48/mi
30K· 18.64 mi
2:47:43
Rank: #20856 (-938)
25K → 30K
32:57 | 10:36/mi
20M
3:02:42
Rank: #21181 (-325)
30K → 20M
14:59 | 11:01/mi
21M
3:13:43
Rank: #21231 (-50)
20M → 21M
11:01 | 11:01/mi
35K· 21.75 mi
3:22:31
Rank: #21510 (-279)
21M → 35K
8:48 | 11:46/mi
23M
3:36:13
Rank: #21625 (-115)
35K → 23M
13:42 | 10:57/mi
24M
3:47:32
Rank: #21795 (-170)
23M → 24M
11:19 | 11:19/mi
40K· 24.85 mi
3:57:08
Rank: #21878 (-83)
24M → 40K
9:36 | 11:14/mi
25.2M
4:01:04
Rank: #21870 (+8)
40K → 25.2M
3:56 | 11:24/mi
Finish· 26.22 mi
4:11:11
Rank: #21885 (-15)
25.2M → Finish
10:07 | 9:56/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:25
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time2:17:46
Pace10:31 /mi
📊Positive Split: 21.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1527:358:5327:35
8:53
-
10K
6.21 mi12:15:3054:508:4927:15
8:46
-0:07
15K
9.32 mi12:42:011:21:218:4426:31
8:32
-0:14
20K
12.43 mi13:08:121:47:328:3926:11
8:26
-0:06
Half
13.11 mi13:14:051:53:258:395:53
8:37
+0:11
25K
15.53 mi13:35:262:14:468:4121:21
8:48
+0:11
30K
18.64 mi14:08:232:47:439:0032:57
10:36
+1:48
20M
20.00 mi14:23:223:02:429:0814:59
11:01
+0:25
21M
21.00 mi14:34:233:13:439:1311:01
11:01
0:00
35K
21.75 mi14:43:113:22:319:198:48
11:46
+0:45
23M
23.00 mi14:56:533:36:139:2413:42
10:57
-0:49
24M
24.00 mi15:08:123:47:329:2911:19
11:19
+0:22
40K
24.85 mi15:17:483:57:089:329:36
11:14
-0:05
25.2M
25.20 mi15:21:444:01:049:343:56
11:24
+0:10
Finish
26.22 mi15:31:514:11:119:3510:07
9:56
-1:28

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

8:26 /mi

Average Pace

9:35 /mi

Slowest Pace

11:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:24:53

58% of race

Time at Steady Pace

1:12:39

29% of race

Time at Slower Pace

33:39

13% of race

Average Pace: 9:35 /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 mi11:48:1527:358:5327:35
8:53
#21888
10K
6.21 mi12:15:3054:508:4927:15
8:46
#21573
15K
9.32 mi12:42:011:21:218:4426:31
8:32
#20897
20K
12.43 mi13:08:121:47:328:3926:11
8:26
#20145
Half
13.11 mi13:14:051:53:258:395:53
8:37
#20123
25K
15.53 mi13:35:262:14:468:4121:21
8:48
#19918
30K
18.64 mi14:08:232:47:439:0032:57
10:36
#20856
20M
20.00 mi14:23:223:02:429:0814:59
11:01
#21181
21M
21.00 mi14:34:233:13:439:1311:01
11:01
#21231
35K
21.75 mi14:43:113:22:319:198:48
11:46
#21510
23M
23.00 mi14:56:533:36:139:2413:42
10:57
#21625
24M
24.00 mi15:08:123:47:329:2911:19
11:19
#21795
40K
24.85 mi15:17:483:57:089:329:36
11:14
#21878
25.2M
25.20 mi15:21:444:01:049:343:56
11:24
#21870
Finish
26.22 mi15:31:514:11:119:3510:07
9:56
#21885
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21888132631326319534(Top 69%)12292(Top 76%)12292(Top 218%)
10K6.21 mi3.10 mi21573+31513137+12613137+12621253(Top 75%)13022(Top 81%)13022(Top 231%)
15K9.32 mi3.11 mi20897+67612852+28512852+28519534(Top 69%)12292(Top 76%)12292(Top 218%)
20K12.43 mi3.11 mi20145+75212535+31712535+31717716(Top 62%)11494(Top 71%)11494(Top 204%)
Half13.11 mi0.68 mi20123+2212523+1212523+1219920(Top 70%)12447(Top 77%)12447(Top 221%)
25K15.53 mi2.42 mi19918+20512429+9412429+9418960(Top 67%)11954(Top 74%)11954(Top 212%)
30K18.64 mi3.11 mi20856-93812786-35712786-35723174(Top 82%)13688(Top 85%)13688(Top 243%)
20M20.00 mi1.36 mi21181-32512914-12812914-12823621(Top 83%)13810(Top 86%)13810(Top 245%)
21M21.00 mi1.00 mi21231-5012928-1412928-1421470(Top 76%)12719(Top 79%)12719(Top 225%)
35K21.75 mi0.75 mi21510-27913045-11713045-11725499(Top 90%)14583(Top 91%)14583(Top 258%)
23M23.00 mi1.25 mi21625-11513063-1813063-1823081(Top 81%)13377(Top 83%)13377(Top 237%)
24M24.00 mi1.00 mi21795-17013111-4813111-4824594(Top 87%)14102(Top 88%)14102(Top 250%)
40K24.85 mi0.85 mi21878-8313127-1613127-1623613(Top 83%)13561(Top 84%)13561(Top 240%)
25.2M25.20 mi0.35 mi21870+813117+1013117+1021787(Top 77%)12684(Top 79%)12684(Top 225%)
Finish26.22 mi1.02 mi21885-1513114+313114+322701(Top 80%)13125(Top 81%)13125(Top 233%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

19534

Males

12292

M18-39

12292

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

21253

Males

13022

M18-39

13022

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

19534

Males

12292

M18-39

12292

15K→20K

9.3 - 12.4 mi

Top 62%
×5stories
+106ft-86ft

Overall

17716

Males

11494

M18-39

11494

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19920

Males

12447

M18-39

12447

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

18960

Males

11954

M18-39

11954

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23174

Males

13688

M18-39

13688

30K→20M

18.6 - 20.0 mi

Top 83%
×5stories
+64ft-50ft

Overall

23621

Males

13810

M18-39

13810

20M→21M

20.0 - 21.0 mi

Top 76%
×8stories
+106ft-24ft

Overall

21470

Males

12719

M18-39

12719

21M→35K

21.0 - 21.8 mi

Top 90%
×7stories
+17ft-86ft

Overall

25499

Males

14583

M18-39

14583

35K→23M

21.8 - 23.0 mi

Top 81%
×5stories
+23ft-63ft

Overall

23081

Males

13377

M18-39

13377

23M→24M

23.0 - 24.0 mi

Top 87%
×6stories
+12ft-82ft

Overall

24594

Males

14102

M18-39

14102

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

23613

Males

13561

M18-39

13561

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21787

Males

12684

M18-39

12684

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

22701

Males

13125

M18-39

13125

Passing Analysis

Category:
Athletes Passed
2558
Passed By
2555
Net Change
+3
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21888
5K → 10K461146+315#21888#21573
10K → 15K68812+676#21573#20897
15K → 20K7575+752#20897#20145
20K → Half4826+22#20145#20123
Half → 25K26055+205#20123#19918
25K → 30K54992-938#19918#20856
30K → 20M33358-325#20856#21181
20M → 21M68118-50#21181#21231
21M → 35K15294-279#21231#21510
35K → 23M59174-115#21510#21625
23M → 24M15185-170#21625#21795
24M → 40K28111-83#21795#21878
40K → 25.2M2315+8#21878#21870
25.2M → Finish4964-15#21870#21885
TOTALS25582555+3
📊

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