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BOSTON MARATHON 2025

Brian Siebert

Bib: 12600•M

MO

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 35%
Gender (Male)
#0 / 16105
Top 48%
Masters (Masters Men)
#0 / 10463
Top 37%
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:00
Rank: #11336
Start → 5K
23:00 | 7:24/mi
10K· 6.21 mi
45:49
Rank: #10981 (+355)
5K → 10K
22:49 | 7:21/mi
15K· 9.32 mi
1:08:11
Rank: #10340 (+641)
10K → 15K
22:22 | 7:12/mi
20K· 12.43 mi
1:30:55
Rank: #10005 (+335)
15K → 20K
22:44 | 7:19/mi
Half· 13.11 mi
1:35:48
Rank: #9942 (+63)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:53:41
Rank: #9729 (+213)
Half → 25K
17:53 | 7:23/mi
30K· 18.64 mi
2:17:05
Rank: #9305 (+424)
25K → 30K
23:24 | 7:32/mi
20M
2:27:33
Rank: #9208 (+97)
30K → 20M
10:28 | 7:42/mi
21M
2:35:37
Rank: #9070 (+138)
20M → 21M
8:04 | 8:04/mi
35K· 21.75 mi
2:41:13
Rank: #9030 (+40)
21M → 35K
5:36 | 7:29/mi
23M
2:51:17
Rank: #9056 (-26)
35K → 23M
10:04 | 8:02/mi
24M
2:59:32
Rank: #9234 (-178)
23M → 24M
8:15 | 8:15/mi
40K· 24.85 mi
3:07:11
Rank: #9506 (-272)
24M → 40K
7:39 | 8:57/mi
25.2M
3:10:31
Rank: #9602 (-96)
40K → 25.2M
3:20 | 9:40/mi
Finish· 26.22 mi
3:19:38
Rank: #10034 (-432)
25.2M → Finish
9:07 | 8:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:48
Pace7:18 /mi
2nd Half
Distance13.11 mi
Time1:43:50
Pace7:55 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:3123:007:2423:00
7:24
-
10K
6.21 mi11:13:2045:497:2222:49
7:21
-0:03
15K
9.32 mi11:35:421:08:117:1922:22
7:12
-0:09
20K
12.43 mi11:58:261:30:557:1922:44
7:19
+0:07
Half
13.11 mi12:03:191:35:487:184:53
7:09
-0:10
25K
15.53 mi12:21:121:53:417:1917:53
7:23
+0:14
30K
18.64 mi12:44:362:17:057:2123:24
7:32
+0:09
20M
20.00 mi12:55:042:27:337:2310:28
7:42
+0:10
21M
21.00 mi13:03:082:35:377:258:04
8:04
+0:22
35K
21.75 mi13:08:442:41:137:255:36
7:29
-0:35
23M
23.00 mi13:18:482:51:177:2710:04
8:02
+0:33
24M
24.00 mi13:27:032:59:327:298:15
8:15
+0:13
40K
24.85 mi13:34:423:07:117:327:39
8:57
+0:42
25.2M
25.20 mi13:38:023:10:317:343:20
9:40
+0:43
Finish
26.22 mi13:47:093:19:387:379:07
8:57
-0:43

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

7:09 /mi

Average Pace

7:37 /mi

Slowest Pace

9:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:53

2% of race

Time at Steady Pace

2:28:16

74% of race

Time at Slower Pace

46:29

23% of race

Average Pace: 7:37 /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 mi10:50:3123:007:2423:00
7:24
#11336
10K
6.21 mi11:13:2045:497:2222:49
7:21
#10981
15K
9.32 mi11:35:421:08:117:1922:22
7:12
#10340
20K
12.43 mi11:58:261:30:557:1922:44
7:19
#10005
Half
13.11 mi12:03:191:35:487:184:53
7:09
#9942
25K
15.53 mi12:21:121:53:417:1917:53
7:23
#9729
30K
18.64 mi12:44:362:17:057:2123:24
7:32
#9305
20M
20.00 mi12:55:042:27:337:2310:28
7:42
#9208
21M
21.00 mi13:03:082:35:377:258:04
8:04
#9070
35K
21.75 mi13:08:442:41:137:255:36
7:29
#9030
23M
23.00 mi13:18:482:51:177:2710:04
8:02
#9056
24M
24.00 mi13:27:032:59:327:298:15
8:15
#9234
40K
24.85 mi13:34:423:07:117:327:39
8:57
#9506
25.2M
25.20 mi13:38:023:10:317:343:20
9:40
#9602
Finish
26.22 mi13:47:093:19:387:379:07
8:57
#10034
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi11336885688569109(Top 32%)7614(Top 47%)7614(Top 319%)
10K6.21 mi3.10 mi10981+3558656+2008656+20010687(Top 38%)8506(Top 53%)8506(Top 356%)
15K9.32 mi3.11 mi10340+6418321+3358321+3359109(Top 32%)7614(Top 47%)7614(Top 319%)
20K12.43 mi3.11 mi10005+3358108+2138108+2139182(Top 32%)7554(Top 47%)7554(Top 317%)
Half13.11 mi0.68 mi9942+638076+328076+328729(Top 31%)7341(Top 46%)7341(Top 308%)
25K15.53 mi2.42 mi9729+2137924+1527924+1528956(Top 32%)7315(Top 45%)7315(Top 307%)
30K18.64 mi3.11 mi9305+4247639+2857639+2857970(Top 28%)6570(Top 41%)6570(Top 275%)
20M20.00 mi1.36 mi9208+977558+817558+818363(Top 29%)6656(Top 41%)6656(Top 279%)
21M21.00 mi1.00 mi9070+1387443+1157443+1157741(Top 27%)6124(Top 38%)6124(Top 257%)
35K21.75 mi0.75 mi9030+407401+427401+428510(Top 30%)6602(Top 41%)6602(Top 277%)
23M23.00 mi1.25 mi9056-267366+357366+3510302(Top 36%)7386(Top 46%)7386(Top 310%)
24M24.00 mi1.00 mi9234-1787443-777443-7712878(Top 45%)8582(Top 53%)8582(Top 360%)
40K24.85 mi0.85 mi9506-2727547-1047547-10415961(Top 56%)9887(Top 61%)9887(Top 414%)
25.2M25.20 mi0.35 mi9602-967576-297576-2915346(Top 54%)9541(Top 59%)9541(Top 400%)
Finish26.22 mi1.02 mi10034-4327769-1937769-19318733(Top 66%)11223(Top 70%)11223(Top 470%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

9109

Males

7614

M45-49

7614

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10687

Males

8506

M45-49

8506

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

9109

Males

7614

M45-49

7614

15K→20K

9.3 - 12.4 mi

Top 32%
×5stories
+106ft-86ft

Overall

9182

Males

7554

M45-49

7554

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8729

Males

7341

M45-49

7341

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

8956

Males

7315

M45-49

7315

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7970

Males

6570

M45-49

6570

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

8363

Males

6656

M45-49

6656

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7741

Males

6124

M45-49

6124

21M→35K

21.0 - 21.8 mi

Top 30%
×7stories
+17ft-86ft

Overall

8510

Males

6602

M45-49

6602

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10302

Males

7386

M45-49

7386

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12878

Males

8582

M45-49

8582

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

15961

Males

9887

M45-49

9887

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15346

Males

9541

M45-49

9541

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2stories
+22ft-21ft

Overall

18733

Males

11223

M45-49

11223

Passing Analysis

Category:
Athletes Passed
2882*
Passed By
1578
Net Change
+1302
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11336
5K → 10K489134+355#11336#10981
10K → 15K6487+641#10981#10340
15K → 20K37539+335#10340#10005
20K → Half67*4+63#10005#9942
Half → 25K26249+213#9942#9729
25K → 30K45935+424#9729#9305
30K → 20M14548+97#9305#9208
20M → 21M17133+138#9208#9070
21M → 35K8141+40#9070#9030
35K → 23M106132-26#9030#9056
23M → 24M34212-178#9056#9234
24M → 40K25297-272#9234#9506
40K → 25.2M11107-96#9506#9602
25.2M → Finish9440-432#9602#10034
TOTALS2882*1578+1302

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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