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BOSTON MARATHON 2025

Zachary Kieffer

Bib: 7112•M

ME

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 25%
Gender (Male)
#0 / 16105
Top 38%
Masters (Masters Men)
#0 / 10463
Top 25%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:59
Rank: #5932
Start → 5K
20:59 | 6:45/mi
10K· 6.21 mi
42:05
Rank: #6035 (-103)
5K → 10K
21:06 | 6:47/mi
15K· 9.32 mi
1:03:30
Rank: #6318 (-283)
10K → 15K
21:25 | 6:54/mi
20K· 12.43 mi
1:25:21
Rank: #6560 (-242)
15K → 20K
21:51 | 7:02/mi
Half· 13.11 mi
1:30:04
Rank: #6594 (-34)
20K → Half
4:43 | 6:55/mi
25K· 15.53 mi
1:47:18
Rank: #6622 (-28)
Half → 25K
17:14 | 7:06/mi
30K· 18.64 mi
2:10:26
Rank: #6640 (-18)
25K → 30K
23:08 | 7:27/mi
20M
2:21:06
Rank: #6734 (-94)
30K → 20M
10:40 | 7:51/mi
21M
2:29:17
Rank: #6746 (-12)
20M → 21M
8:11 | 8:11/mi
35K· 21.75 mi
2:35:02
Rank: #6817 (-71)
21M → 35K
5:45 | 7:41/mi
23M
2:44:58
Rank: #6934 (-117)
35K → 23M
9:56 | 7:56/mi
24M
2:52:52
Rank: #7027 (-93)
23M → 24M
7:54 | 7:54/mi
40K· 24.85 mi
2:59:48
Rank: #7116 (-89)
24M → 40K
6:56 | 8:07/mi
25.2M
3:02:47
Rank: #7127 (-11)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
3:10:18
Rank: #7143 (-16)
25.2M → Finish
7:31 | 7:23/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:04
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time1:40:14
Pace7:39 /mi
📊Positive Split: 11.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:1220:596:4520:59
6:45
-
10K
6.21 mi10:48:1842:056:4621:06
6:47
+0:02
15K
9.32 mi11:09:431:03:306:4921:25
6:54
+0:07
20K
12.43 mi11:31:341:25:216:5221:51
7:02
+0:08
Half
13.11 mi11:36:171:30:046:524:43
6:55
-0:07
25K
15.53 mi11:53:311:47:186:5417:14
7:06
+0:11
30K
18.64 mi12:16:392:10:267:0023:08
7:27
+0:21
20M
20.00 mi12:27:192:21:067:0310:40
7:51
+0:24
21M
21.00 mi12:35:302:29:177:078:11
8:11
+0:20
35K
21.75 mi12:41:152:35:027:085:45
7:41
-0:30
23M
23.00 mi12:51:112:44:587:109:56
7:56
+0:15
24M
24.00 mi12:59:052:52:527:127:54
7:54
-0:02
40K
24.85 mi13:06:012:59:487:146:56
8:07
+0:13
25.2M
25.20 mi13:09:003:02:477:152:59
8:39
+0:32
Finish
26.22 mi13:16:313:10:187:167:31
7:23
-1:16

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

6:45 /mi

Average Pace

7:16 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:18

56% of race

Time at Steady Pace

36:24

19% of race

Time at Slower Pace

46:36

24% of race

Average Pace: 7:15 /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 mi10:27:1220:596:4520:59
6:45
#5932
10K
6.21 mi10:48:1842:056:4621:06
6:47
#6035
15K
9.32 mi11:09:431:03:306:4921:25
6:54
#6318
20K
12.43 mi11:31:341:25:216:5221:51
7:02
#6560
Half
13.11 mi11:36:171:30:046:524:43
6:55
#6594
25K
15.53 mi11:53:311:47:186:5417:14
7:06
#6622
30K
18.64 mi12:16:392:10:267:0023:08
7:27
#6640
20M
20.00 mi12:27:192:21:067:0310:40
7:51
#6734
21M
21.00 mi12:35:302:29:177:078:11
8:11
#6746
35K
21.75 mi12:41:152:35:027:085:45
7:41
#6817
23M
23.00 mi12:51:112:44:587:109:56
7:56
#6934
24M
24.00 mi12:59:052:52:527:127:54
7:54
#7027
40K
24.85 mi13:06:012:59:487:146:56
8:07
#7116
25.2M
25.20 mi13:09:003:02:477:152:59
8:39
#7127
Finish
26.22 mi13:16:313:10:187:167:31
7:23
#7143
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5932545854586893(Top 24%)6169(Top 38%)6169(Top 275%)
10K6.21 mi3.10 mi6035-1035536-785536-786300(Top 22%)5723(Top 36%)5723(Top 255%)
15K9.32 mi3.11 mi6318-2835763-2275763-2276893(Top 24%)6169(Top 38%)6169(Top 275%)
20K12.43 mi3.11 mi6560-2425929-1665929-1667070(Top 25%)6257(Top 39%)6257(Top 278%)
Half13.11 mi0.68 mi6594-345956-275956-276944(Top 24%)6164(Top 38%)6164(Top 274%)
25K15.53 mi2.42 mi6622-285965-95965-97012(Top 25%)6125(Top 38%)6125(Top 273%)
30K18.64 mi3.11 mi6640-185938+275938+277337(Top 26%)6175(Top 38%)6175(Top 275%)
20M20.00 mi1.36 mi6734-945986-485986-489335(Top 33%)7162(Top 44%)7162(Top 319%)
21M21.00 mi1.00 mi6746-125972+145972+148427(Top 30%)6487(Top 40%)6487(Top 289%)
35K21.75 mi0.75 mi6817-716010-386010-389892(Top 35%)7292(Top 45%)7292(Top 325%)
23M23.00 mi1.25 mi6934-1176057-476057-479490(Top 33%)6961(Top 43%)6961(Top 310%)
24M24.00 mi1.00 mi7027-936081-246081-2410497(Top 37%)7410(Top 46%)7410(Top 330%)
40K24.85 mi0.85 mi7116-896113-326113-3210864(Top 38%)7474(Top 46%)7474(Top 333%)
25.2M25.20 mi0.35 mi7127-116106+76106+79612(Top 34%)6731(Top 42%)6731(Top 300%)
Finish26.22 mi1.02 mi7143-166092+146092+148287(Top 29%)6063(Top 38%)6063(Top 270%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21stories
+97ft-345ft

Overall

6893

Males

6169

M40-44

6169

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

6300

Males

5723

M40-44

5723

10K→15K

6.2 - 9.3 mi

Top 24%
×3stories
+67ft-78ft

Overall

6893

Males

6169

M40-44

6169

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

7070

Males

6257

M40-44

6257

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6944

Males

6164

M40-44

6164

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

7012

Males

6125

M40-44

6125

25K→30K

15.5 - 18.6 mi

Top 26%
×9stories
+181ft-148ft

Overall

7337

Males

6175

M40-44

6175

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

9335

Males

7162

M40-44

7162

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

8427

Males

6487

M40-44

6487

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

9892

Males

7292

M40-44

7292

35K→23M

21.8 - 23.0 mi

Top 33%
×5stories
+23ft-63ft

Overall

9490

Males

6961

M40-44

6961

23M→24M

23.0 - 24.0 mi

Top 37%
×6stories
+12ft-82ft

Overall

10497

Males

7410

M40-44

7410

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10864

Males

7474

M40-44

7474

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9612

Males

6731

M40-44

6731

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

8287

Males

6063

M40-44

6063

Passing Analysis

Category:
Athletes Passed
984
Passed By
2195
Net Change
-1211
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5932
5K → 10K138241-103#5932#6035
10K → 15K73356-283#6035#6318
15K → 20K79321-242#6318#6560
20K → Half1852-34#6560#6594
Half → 25K115143-28#6594#6622
25K → 30K177195-18#6622#6640
30K → 20M58152-94#6640#6734
20M → 21M7082-12#6734#6746
21M → 35K2899-71#6746#6817
35K → 23M67184-117#6817#6934
23M → 24M40133-93#6934#7027
24M → 40K39128-89#7027#7116
40K → 25.2M2637-11#7116#7127
25.2M → Finish5672-16#7127#7143
TOTALS9842195-1211
📊

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