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BOSTON MARATHON 2025

Thomas Zehnacker

Bib: 12951•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 38%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 40%
Division (M55-59)
#0 / 1648
Top 23%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:38
Rank: #10195
Start → 5K
22:38 | 7:17/mi
10K· 6.21 mi
45:34
Rank: #10612 (-417)
5K → 10K
22:56 | 7:23/mi
15K· 9.32 mi
1:08:29
Rank: #10614 (-2)
10K → 15K
22:55 | 7:23/mi
20K· 12.43 mi
1:31:31
Rank: #10434 (+180)
15K → 20K
23:02 | 7:25/mi
Half· 13.11 mi
1:36:34
Rank: #10451 (-17)
20K → Half
5:03 | 7:24/mi
25K· 15.53 mi
1:55:06
Rank: #10536 (-85)
Half → 25K
18:32 | 7:39/mi
30K· 18.64 mi
2:19:49
Rank: #10594 (-58)
25K → 30K
24:43 | 7:57/mi
20M
2:31:05
Rank: #10725 (-131)
30K → 20M
11:16 | 8:17/mi
21M
2:39:44
Rank: #10723 (+2)
20M → 21M
8:39 | 8:39/mi
35K· 21.75 mi
2:45:36
Rank: #10720 (+3)
21M → 35K
5:52 | 7:51/mi
23M
2:55:52
Rank: #10709 (+11)
35K → 23M
10:16 | 8:12/mi
24M
3:03:52
Rank: #10706 (+3)
23M → 24M
8:00 | 8:00/mi
40K· 24.85 mi
3:10:54
Rank: #10722 (-16)
24M → 40K
7:02 | 8:14/mi
25.2M
3:14:14
Rank: #10798 (-76)
40K → 25.2M
3:20 | 9:40/mi
Finish· 26.22 mi
3:22:26
Rank: #10871 (-73)
25.2M → Finish
8:12 | 8:03/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:34
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:45:52
Pace8:05 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4422:387:1722:38
7:17
-
10K
6.21 mi11:14:4045:347:2022:56
7:23
+0:06
15K
9.32 mi11:37:351:08:297:2122:55
7:23
0:00
20K
12.43 mi12:00:371:31:317:2223:02
7:25
+0:02
Half
13.11 mi12:05:401:36:347:225:03
7:24
-0:01
25K
15.53 mi12:24:121:55:067:2518:32
7:39
+0:15
30K
18.64 mi12:48:552:19:497:3024:43
7:57
+0:18
20M
20.00 mi13:00:112:31:057:3311:16
8:17
+0:20
21M
21.00 mi13:08:502:39:447:368:39
8:39
+0:22
35K
21.75 mi13:14:422:45:367:375:52
7:51
-0:48
23M
23.00 mi13:24:582:55:527:3910:16
8:12
+0:21
24M
24.00 mi13:32:583:03:527:408:00
8:00
-0:12
40K
24.85 mi13:40:003:10:547:417:02
8:14
+0:14
25.2M
25.20 mi13:43:203:14:147:423:20
9:40
+1:26
Finish
26.22 mi13:51:323:22:267:448:12
8:03
-1:37

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

7:17 /mi

Average Pace

7:44 /mi

Slowest Pace

9:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:34

48% of race

Time at Steady Pace

1:22:37

41% of race

Time at Slower Pace

23:15

11% of race

Average Pace: 7:43 /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 mi10:51:4422:387:1722:38
7:17
#10195
10K
6.21 mi11:14:4045:347:2022:56
7:23
#10612
15K
9.32 mi11:37:351:08:297:2122:55
7:23
#10614
20K
12.43 mi12:00:371:31:317:2223:02
7:25
#10434
Half
13.11 mi12:05:401:36:347:225:03
7:24
#10451
25K
15.53 mi12:24:121:55:067:2518:32
7:39
#10536
30K
18.64 mi12:48:552:19:497:3024:43
7:57
#10594
20M
20.00 mi13:00:112:31:057:3311:16
8:17
#10725
21M
21.00 mi13:08:502:39:447:368:39
8:39
#10723
35K
21.75 mi13:14:422:45:367:375:52
7:51
#10720
23M
23.00 mi13:24:582:55:527:3910:16
8:12
#10709
24M
24.00 mi13:32:583:03:527:408:00
8:00
#10706
40K
24.85 mi13:40:003:10:547:417:02
8:14
#10722
25.2M
25.20 mi13:43:203:14:147:423:20
9:40
#10798
Finish
26.22 mi13:51:323:22:267:448:12
8:03
#10871
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi101958277827710642(Top 37%)8420(Top 52%)8420(Top 511%)
10K6.21 mi3.10 mi10612-4178470-1938470-19311006(Top 39%)8669(Top 54%)8669(Top 526%)
15K9.32 mi3.11 mi10614-28451+198451+1910642(Top 37%)8420(Top 52%)8420(Top 511%)
20K12.43 mi3.11 mi10434+1808339+1128339+11210006(Top 35%)8014(Top 50%)8014(Top 486%)
Half13.11 mi0.68 mi10451-178339833910838(Top 38%)8463(Top 53%)8463(Top 514%)
25K15.53 mi2.42 mi10536-858359-208359-2011076(Top 39%)8422(Top 52%)8422(Top 511%)
30K18.64 mi3.11 mi10594-588312+478312+4711058(Top 39%)8213(Top 51%)8213(Top 498%)
20M20.00 mi1.36 mi10725-1318326-148326-1412401(Top 44%)8720(Top 54%)8720(Top 529%)
21M21.00 mi1.00 mi10723+28291+358291+3511348(Top 40%)8046(Top 50%)8046(Top 488%)
35K21.75 mi0.75 mi10720+38273+188273+1811092(Top 39%)7903(Top 49%)7903(Top 480%)
23M23.00 mi1.25 mi10709+118216+578216+5711346(Top 40%)7913(Top 49%)7913(Top 480%)
24M24.00 mi1.00 mi10706+38181+358181+3511217(Top 39%)7770(Top 48%)7770(Top 471%)
40K24.85 mi0.85 mi10722-168160+218160+2111691(Top 41%)7907(Top 49%)7907(Top 480%)
25.2M25.20 mi0.35 mi10798-768175-158175-1515353(Top 54%)9548(Top 59%)9548(Top 579%)
Finish26.22 mi1.02 mi10871-738171+48171+413174(Top 46%)8597(Top 53%)8597(Top 522%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

10642

Males

8420

M55-59

8420

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

11006

Males

8669

M55-59

8669

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

10642

Males

8420

M55-59

8420

15K→20K

9.3 - 12.4 mi

Top 35%
×5stories
+106ft-86ft

Overall

10006

Males

8014

M55-59

8014

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

10838

Males

8463

M55-59

8463

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

11076

Males

8422

M55-59

8422

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

11058

Males

8213

M55-59

8213

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

12401

Males

8720

M55-59

8720

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

11348

Males

8046

M55-59

8046

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

11092

Males

7903

M55-59

7903

35K→23M

21.8 - 23.0 mi

Top 40%
×5stories
+23ft-63ft

Overall

11346

Males

7913

M55-59

7913

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

11217

Males

7770

M55-59

7770

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11691

Males

7907

M55-59

7907

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15353

Males

9548

M55-59

9548

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

13174

Males

8597

M55-59

8597

Passing Analysis

Category:
Athletes Passed
1493
Passed By
2168
Net Change
-676
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10195
5K → 10K128545-417#10195#10612
10K → 15K168170-2#10612#10614
15K → 20K26383+180#10614#10434
20K → Half3148-17#10434#10451
Half → 25K133218-85#10451#10536
25K → 30K213270-58#10536#10594
30K → 20M77208-131#10594#10725
20M → 21M10199+2#10725#10723
21M → 35K5451+3#10723#10720
35K → 23M120109+11#10720#10709
23M → 24M7471+3#10709#10706
24M → 40K6783-16#10706#10722
40K → 25.2M1692-76#10722#10798
25.2M → Finish48121-73#10798#10871
TOTALS14932168-676
📊

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