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BOSTON MARATHON 2025

Zackary Simkover

Bib: 7520•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 22%
Gender (Male)
#0 / 16105
Top 34%
Masters (Masters Men)
#0 / 10463
Top 21%
Division (M40-44)
#0 / 2247
Top 47%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:30
Rank: #4580
Start → 5K
20:30 | 6:36/mi
10K· 6.21 mi
41:06
Rank: #4612 (-32)
5K → 10K
20:36 | 6:38/mi
15K· 9.32 mi
1:01:54
Rank: #4720 (-108)
10K → 15K
20:48 | 6:42/mi
20K· 12.43 mi
1:22:57
Rank: #4777 (-57)
15K → 20K
21:03 | 6:47/mi
Half· 13.11 mi
1:27:35
Rank: #4841 (-64)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:44:32
Rank: #5060 (-219)
Half → 25K
16:57 | 6:59/mi
30K· 18.64 mi
2:06:46
Rank: #5165 (-105)
25K → 30K
22:14 | 7:09/mi
20M
2:16:36
Rank: #5183 (-18)
30K → 20M
9:50 | 7:14/mi
21M
2:24:24
Rank: #5239 (-56)
20M → 21M
7:48 | 7:48/mi
35K· 21.75 mi
2:29:46
Rank: #5284 (-45)
21M → 35K
5:22 | 7:10/mi
23M
2:39:07
Rank: #5308 (-24)
35K → 23M
9:21 | 7:28/mi
24M
2:46:45
Rank: #5394 (-86)
23M → 24M
7:38 | 7:38/mi
40K· 24.85 mi
2:53:33
Rank: #5469 (-75)
24M → 40K
6:48 | 7:57/mi
25.2M
2:57:25
Rank: #5705 (-236)
40K → 25.2M
3:52 | 11:13/mi
Finish· 26.22 mi
3:07:17
Rank: #6296 (-591)
25.2M → Finish
9:52 | 9:41/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:35
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:39:42
Pace7:36 /mi
📊Positive Split: 13.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:2120:306:3620:30
6:36
-
10K
6.21 mi10:47:5741:066:3720:36
6:38
+0:02
15K
9.32 mi11:08:451:01:546:3820:48
6:42
+0:04
20K
12.43 mi11:29:481:22:576:4021:03
6:47
+0:05
Half
13.11 mi11:34:261:27:356:414:38
6:47
0:00
25K
15.53 mi11:51:231:44:326:4416:57
6:59
+0:12
30K
18.64 mi12:13:372:06:466:4822:14
7:09
+0:10
20M
20.00 mi12:23:272:16:366:509:50
7:14
+0:05
21M
21.00 mi12:31:152:24:246:537:48
7:48
+0:34
35K
21.75 mi12:36:372:29:466:535:22
7:10
-0:38
23M
23.00 mi12:45:582:39:076:559:21
7:28
+0:18
24M
24.00 mi12:53:362:46:456:577:38
7:38
+0:10
40K
24.85 mi13:00:242:53:336:596:48
7:57
+0:19
25.2M
25.20 mi13:04:162:57:257:023:52
11:13
+3:16
Finish
26.22 mi13:14:083:07:177:099:52
9:41
-1:32

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

6:36 /mi

Average Pace

7:09 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:38:57

85% of race

Time at Slower Pace

28:20

15% of race

Average Pace: 7:09 /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 mi10:27:2120:306:3620:30
6:36
#4580
10K
6.21 mi10:47:5741:066:3720:36
6:38
#4612
15K
9.32 mi11:08:451:01:546:3820:48
6:42
#4720
20K
12.43 mi11:29:481:22:576:4021:03
6:47
#4777
Half
13.11 mi11:34:261:27:356:414:38
6:47
#4841
25K
15.53 mi11:51:231:44:326:4416:57
6:59
#5060
30K
18.64 mi12:13:372:06:466:4822:14
7:09
#5165
20M
20.00 mi12:23:272:16:366:509:50
7:14
#5183
21M
21.00 mi12:31:152:24:246:537:48
7:48
#5239
35K
21.75 mi12:36:372:29:466:535:22
7:10
#5284
23M
23.00 mi12:45:582:39:076:559:21
7:28
#5308
24M
24.00 mi12:53:362:46:456:577:38
7:38
#5394
40K
24.85 mi13:00:242:53:336:596:48
7:57
#5469
25.2M
25.20 mi13:04:162:57:257:023:52
11:13
#5705
Finish
26.22 mi13:14:083:07:177:099:52
9:41
#6296
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4580430343035026(Top 18%)4671(Top 29%)4671(Top 208%)
10K6.21 mi3.10 mi4612-324327-244327-244701(Top 17%)4401(Top 27%)4401(Top 196%)
15K9.32 mi3.11 mi4720-1084416-894416-895026(Top 18%)4671(Top 29%)4671(Top 208%)
20K12.43 mi3.11 mi4777-574457-414457-415057(Top 18%)4665(Top 29%)4665(Top 208%)
Half13.11 mi0.68 mi4841-644512-554512-556045(Top 21%)5466(Top 34%)5466(Top 243%)
25K15.53 mi2.42 mi5060-2194690-1784690-1786264(Top 22%)5588(Top 35%)5588(Top 249%)
30K18.64 mi3.11 mi5165-1054753-634753-635648(Top 20%)5051(Top 31%)5051(Top 225%)
20M20.00 mi1.36 mi5183-184761-84761-85394(Top 19%)4769(Top 30%)4769(Top 212%)
21M21.00 mi1.00 mi5239-564799-384799-386164(Top 22%)5165(Top 32%)5165(Top 230%)
35K21.75 mi0.75 mi5284-454834-354834-356402(Top 23%)5316(Top 33%)5316(Top 237%)
23M23.00 mi1.25 mi5308-244837-34837-36413(Top 23%)5226(Top 32%)5226(Top 233%)
24M24.00 mi1.00 mi5394-864901-644901-648601(Top 30%)6421(Top 40%)6421(Top 286%)
40K24.85 mi0.85 mi5469-754944-434944-439791(Top 34%)6926(Top 43%)6926(Top 308%)
25.2M25.20 mi0.35 mi5705-2365114-1705114-17021204(Top 75%)12366(Top 77%)12366(Top 550%)
Finish26.22 mi1.02 mi6296-5915523-4095523-40921829(Top 77%)12693(Top 79%)12693(Top 565%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5026

Males

4671

M40-44

4671

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4701

Males

4401

M40-44

4401

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5026

Males

4671

M40-44

4671

15K→20K

9.3 - 12.4 mi

Top 18%
×5stories
+106ft-86ft

Overall

5057

Males

4665

M40-44

4665

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

6045

Males

5466

M40-44

5466

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

6264

Males

5588

M40-44

5588

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5648

Males

5051

M40-44

5051

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5394

Males

4769

M40-44

4769

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

6164

Males

5165

M40-44

5165

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6402

Males

5316

M40-44

5316

35K→23M

21.8 - 23.0 mi

Top 23%
×5stories
+23ft-63ft

Overall

6413

Males

5226

M40-44

5226

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

8601

Males

6421

M40-44

6421

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9791

Males

6926

M40-44

6926

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21204

Males

12366

M40-44

12366

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2stories
+22ft-21ft

Overall

21829

Males

12693

M40-44

12693

Passing Analysis

Category:
Athletes Passed
841
Passed By
2557
Net Change
-1716
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4580
5K → 10K156188-32#4580#4612
10K → 15K79187-108#4612#4720
15K → 20K103160-57#4720#4777
20K → Half670-64#4777#4841
Half → 25K56275-219#4841#5060
25K → 30K137242-105#5060#5165
30K → 20M6583-18#5165#5183
20M → 21M66122-56#5183#5239
21M → 35K3277-45#5239#5284
35K → 23M77101-24#5284#5308
23M → 24M27113-86#5308#5394
24M → 40K28103-75#5394#5469
40K → 25.2M5241-236#5469#5705
25.2M → Finish4595-591#5705#6296
TOTALS8412557-1716
📊

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