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BOSTON MARATHON 2025

Mark Ambrefe

Bib: 8291•M

MA

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
34:35
Rank: #27690
Start → 5K
34:35 | 11:08/mi
10K· 6.21 mi
1:11:03
Rank: #27764 (-74)
5K → 10K
36:28 | 11:44/mi
15K· 9.32 mi
1:47:36
Rank: #27671 (+93)
10K → 15K
36:33 | 11:46/mi
20K· 12.43 mi
2:26:22
Rank: #27656 (+15)
15K → 20K
38:46 | 12:29/mi
Half· 13.11 mi
2:34:17
Rank: #27623 (+33)
20K → Half
7:55 | 11:36/mi
25K· 15.53 mi
3:06:44
Rank: #27617 (+6)
Half → 25K
32:27 | 13:23/mi
30K· 18.64 mi
3:42:57
Rank: #27256 (+361)
25K → 30K
36:13 | 11:39/mi
20M
3:58:42
Rank: #27123 (+133)
30K → 20M
15:45 | 11:35/mi
21M
4:09:56
Rank: #26975 (+148)
20M → 21M
11:14 | 11:14/mi
35K· 21.75 mi
4:16:56
Rank: #26846 (+129)
21M → 35K
7:00 | 9:21/mi
23M
4:28:46
Rank: #26584 (+262)
35K → 23M
11:50 | 9:27/mi
24M
4:38:27
Rank: #26435 (+149)
23M → 24M
9:41 | 9:41/mi
40K· 24.85 mi
4:46:37
Rank: #26263 (+172)
24M → 40K
8:10 | 9:33/mi
25.2M
4:50:07
Rank: #26208 (+55)
40K → 25.2M
3:30 | 10:09/mi
Finish· 26.22 mi
4:58:58
Rank: #26088 (+120)
25.2M → Finish
8:51 | 8:41/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:34:17
Pace11:46 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:24:41
Pace11:02 /mi
📊Negative Split: 6.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:57:0834:3511:0834:35
11:08
-
10K
6.21 mi12:33:361:11:0311:2636:28
11:44
+0:36
15K
9.32 mi13:10:091:47:3611:3336:33
11:46
+0:02
20K
12.43 mi13:48:552:26:2211:4738:46
12:29
+0:43
Half
13.11 mi13:56:502:34:1711:467:55
11:36
-0:53
25K
15.53 mi14:29:173:06:4412:0132:27
13:23
+1:47
30K
18.64 mi15:05:303:42:5711:5836:13
11:39
-1:44
20M
20.00 mi15:21:153:58:4211:5615:45
11:35
-0:04
21M
21.00 mi15:32:294:09:5611:5411:14
11:14
-0:21
35K
21.75 mi15:39:294:16:5611:497:00
9:21
-1:53
23M
23.00 mi15:51:194:28:4611:4111:50
9:27
+0:06
24M
24.00 mi16:01:004:38:2711:369:41
9:41
+0:14
40K
24.85 mi16:09:104:46:3711:328:10
9:33
-0:08
25.2M
25.20 mi16:12:404:50:0711:313:30
10:09
+0:36
Finish
26.22 mi16:21:314:58:5811:258:51
8:41
-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

8:41 /mi

Average Pace

11:25 /mi

Slowest Pace

13:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

49:02

16% of race

Time at Steady Pace

2:58:43

60% of race

Time at Slower Pace

1:11:13

24% of race

Average Pace: 11:24 /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 mi11:57:0834:3511:0834:35
11:08
#27690
10K
6.21 mi12:33:361:11:0311:2636:28
11:44
#27764
15K
9.32 mi13:10:091:47:3611:3336:33
11:46
#27671
20K
12.43 mi13:48:552:26:2211:4738:46
12:29
#27656
Half
13.11 mi13:56:502:34:1711:467:55
11:36
#27623
25K
15.53 mi14:29:173:06:4412:0132:27
13:23
#27617
30K
18.64 mi15:05:303:42:5711:5836:13
11:39
#27256
20M
20.00 mi15:21:153:58:4211:5615:45
11:35
#27123
21M
21.00 mi15:32:294:09:5611:5411:14
11:14
#26975
35K
21.75 mi15:39:294:16:5611:497:00
9:21
#26846
23M
23.00 mi15:51:194:28:4611:4111:50
9:27
#26584
24M
24.00 mi16:01:004:38:2711:369:41
9:41
#26435
40K
24.85 mi16:09:104:46:3711:328:10
9:33
#26263
25.2M
25.20 mi16:12:404:50:0711:313:30
10:09
#26208
Finish
26.22 mi16:21:314:58:5811:258:51
8:41
#26088
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi27690158571585727457(Top 97%)15732(Top 98%)15732(Top 279%)
10K6.21 mi3.10 mi27764-7415885-2815885-2827796(Top 98%)15890(Top 99%)15890(Top 282%)
15K9.32 mi3.11 mi27671+9315839+4615839+4627457(Top 97%)15732(Top 98%)15732(Top 279%)
20K12.43 mi3.11 mi27656+1515818+2115818+2127502(Top 97%)15732(Top 98%)15732(Top 279%)
Half13.11 mi0.68 mi27623+3315806+1215806+1227146(Top 96%)15579(Top 97%)15579(Top 276%)
25K15.53 mi2.42 mi27617+615803+315803+327555(Top 97%)15739(Top 98%)15739(Top 279%)
30K18.64 mi3.11 mi27256+36115633+17015633+17025078(Top 88%)14564(Top 90%)14564(Top 258%)
20M20.00 mi1.36 mi27123+13315576+5715576+5724702(Top 87%)14323(Top 89%)14323(Top 254%)
21M21.00 mi1.00 mi26975+14815509+6715509+6721998(Top 77%)12981(Top 81%)12981(Top 230%)
35K21.75 mi0.75 mi26846+12915449+6015449+6019799(Top 70%)11883(Top 74%)11883(Top 211%)
23M23.00 mi1.25 mi26584+26215316+13315316+13318468(Top 65%)11213(Top 70%)11213(Top 199%)
24M24.00 mi1.00 mi26435+14915254+6215254+6220324(Top 72%)12023(Top 75%)12023(Top 213%)
40K24.85 mi0.85 mi26263+17215160+9415160+9418906(Top 67%)11281(Top 70%)11281(Top 200%)
25.2M25.20 mi0.35 mi26208+5515138+2215138+2217680(Top 62%)10703(Top 66%)10703(Top 190%)
Finish26.22 mi1.02 mi26088+12015091+4715091+4717385(Top 61%)10598(Top 66%)10598(Top 188%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21stories
+97ft-345ft

Overall

27457

Males

15732

M18-39

15732

5K→10K

3.1 - 6.2 mi

Top 98%
×5stories
+79ft-138ft

Overall

27796

Males

15890

M18-39

15890

10K→15K

6.2 - 9.3 mi

Top 97%
×3stories
+67ft-78ft

Overall

27457

Males

15732

M18-39

15732

15K→20K

9.3 - 12.4 mi

Top 97%
×5stories
+106ft-86ft

Overall

27502

Males

15732

M18-39

15732

20K→Half

12.4 - 13.1 mi

Top 96%
×2stories
+19ft-37ft

Overall

27146

Males

15579

M18-39

15579

Half→25K

13.1 - 15.5 mi

Top 97%
×4stories
+66ft-88ft

Overall

27555

Males

15739

M18-39

15739

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

25078

Males

14564

M18-39

14564

30K→20M

18.6 - 20.0 mi

Top 87%
×5stories
+64ft-50ft

Overall

24702

Males

14323

M18-39

14323

20M→21M

20.0 - 21.0 mi

Top 77%
×8stories
+106ft-24ft

Overall

21998

Males

12981

M18-39

12981

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

19799

Males

11883

M18-39

11883

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

18468

Males

11213

M18-39

11213

23M→24M

23.0 - 24.0 mi

Top 72%
×6stories
+12ft-82ft

Overall

20324

Males

12023

M18-39

12023

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

18906

Males

11281

M18-39

11281

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17680

Males

10703

M18-39

10703

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2stories
+22ft-21ft

Overall

17385

Males

10598

M18-39

10598

Passing Analysis

Category:
Athletes Passed
1920
Passed By
318
Net Change
+1602
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27690
5K → 10K69143-74#27690#27764
10K → 15K14047+93#27764#27671
15K → 20K7964+15#27671#27656
20K → Half385+33#27656#27623
Half → 25K6256+6#27623#27617
25K → 30K3621+361#27617#27256
30K → 20M1341+133#27256#27123
20M → 21M1480+148#27123#26975
21M → 35K1290+129#26975#26846
35K → 23M2620+262#26846#26584
23M → 24M1501+149#26584#26435
24M → 40K1720+172#26435#26263
40K → 25.2M550+55#26263#26208
25.2M → Finish1200+120#26208#26088
TOTALS1920318+1602
📊

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