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BOSTON MARATHON 2025

Sam Redfern

Bib: 5771•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 21%
Division (M18-39)
#0 / 5642
Top 44%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:27
Rank: #2213
Start → 5K
19:27 | 6:16/mi
10K· 6.21 mi
38:59
Rank: #2256 (-43)
5K → 10K
19:32 | 6:17/mi
15K· 9.32 mi
58:43
Rank: #2377 (-121)
10K → 15K
19:44 | 6:21/mi
20K· 12.43 mi
1:18:48
Rank: #2502 (-125)
15K → 20K
20:05 | 6:28/mi
Half· 13.11 mi
1:23:13
Rank: #2548 (-46)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:39:25
Rank: #2749 (-201)
Half → 25K
16:12 | 6:41/mi
30K· 18.64 mi
2:01:24
Rank: #3110 (-361)
25K → 30K
21:59 | 7:05/mi
20M
2:11:09
Rank: #3195 (-85)
30K → 20M
9:45 | 7:10/mi
21M
2:18:48
Rank: #3295 (-100)
20M → 21M
7:39 | 7:39/mi
35K· 21.75 mi
2:23:58
Rank: #3323 (-28)
21M → 35K
5:10 | 6:54/mi
23M
2:32:58
Rank: #3351 (-28)
35K → 23M
9:00 | 7:11/mi
24M
2:40:09
Rank: #3424 (-73)
23M → 24M
7:11 | 7:11/mi
40K· 24.85 mi
2:46:21
Rank: #3462 (-38)
24M → 40K
6:12 | 7:15/mi
25.2M
2:49:07
Rank: #3488 (-26)
40K → 25.2M
2:46 | 8:01/mi
Finish· 26.22 mi
2:56:17
Rank: #3564 (-76)
25.2M → Finish
7:10 | 7:02/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:13
Pace6:21 /mi
2nd Half
Distance13.11 mi
Time1:33:04
Pace7:06 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:2619:276:1619:27
6:16
-
10K
6.21 mi10:43:5838:596:1619:32
6:17
+0:01
15K
9.32 mi11:03:4258:436:1819:44
6:21
+0:04
20K
12.43 mi11:23:471:18:486:2020:05
6:28
+0:07
Half
13.11 mi11:28:121:23:136:214:25
6:28
0:00
25K
15.53 mi11:44:241:39:256:2416:12
6:41
+0:13
30K
18.64 mi12:06:232:01:246:3121:59
7:05
+0:24
20M
20.00 mi12:16:082:11:096:339:45
7:10
+0:05
21M
21.00 mi12:23:472:18:486:377:39
7:39
+0:29
35K
21.75 mi12:28:572:23:586:375:10
6:54
-0:45
23M
23.00 mi12:37:572:32:586:399:00
7:11
+0:17
24M
24.00 mi12:45:082:40:096:407:11
7:11
0:00
40K
24.85 mi12:51:202:46:216:426:12
7:15
+0:04
25.2M
25.20 mi12:54:062:49:076:432:46
8:01
+0:46
Finish
26.22 mi13:01:162:56:176:447:10
7:02
-0:59

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

6:16 /mi

Average Pace

6:44 /mi

Slowest Pace

8:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:25

56% of race

Time at Steady Pace

1:06:27

38% of race

Time at Slower Pace

10:25

6% of race

Average Pace: 6:43 /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 mi10:24:2619:276:1619:27
6:16
#2213
10K
6.21 mi10:43:5838:596:1619:32
6:17
#2256
15K
9.32 mi11:03:4258:436:1819:44
6:21
#2377
20K
12.43 mi11:23:471:18:486:2020:05
6:28
#2502
Half
13.11 mi11:28:121:23:136:214:25
6:28
#2548
25K
15.53 mi11:44:241:39:256:2416:12
6:41
#2749
30K
18.64 mi12:06:232:01:246:3121:59
7:05
#3110
20M
20.00 mi12:16:082:11:096:339:45
7:10
#3195
21M
21.00 mi12:23:472:18:486:377:39
7:39
#3295
35K
21.75 mi12:28:572:23:586:375:10
6:54
#3323
23M
23.00 mi12:37:572:32:586:399:00
7:11
#3351
24M
24.00 mi12:45:082:40:096:407:11
7:11
#3424
40K
24.85 mi12:51:202:46:216:426:12
7:15
#3462
25.2M
25.20 mi12:54:062:49:076:432:46
8:01
#3488
Finish
26.22 mi13:01:162:56:176:447:10
7:02
#3564
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2213211421142654(Top 9%)2531(Top 16%)2531(Top 45%)
10K6.21 mi3.10 mi2256-432154-402154-402348(Top 8%)2247(Top 14%)2247(Top 40%)
15K9.32 mi3.11 mi2377-1212272-1182272-1182654(Top 9%)2531(Top 16%)2531(Top 45%)
20K12.43 mi3.11 mi2502-1252387-1152387-1152915(Top 10%)2777(Top 17%)2777(Top 49%)
Half13.11 mi0.68 mi2548-462434-472434-473550(Top 12%)3366(Top 21%)3366(Top 60%)
25K15.53 mi2.42 mi2749-2012621-1872621-1874002(Top 14%)3734(Top 23%)3734(Top 66%)
30K18.64 mi3.11 mi3110-3612957-3362957-3365180(Top 18%)4688(Top 29%)4688(Top 83%)
20M20.00 mi1.36 mi3195-853027-703027-705066(Top 18%)4533(Top 28%)4533(Top 80%)
21M21.00 mi1.00 mi3295-1003117-903117-905384(Top 19%)4654(Top 29%)4654(Top 82%)
35K21.75 mi0.75 mi3323-283139-223139-224771(Top 17%)4214(Top 26%)4214(Top 75%)
23M23.00 mi1.25 mi3351-283161-223161-224803(Top 17%)4179(Top 26%)4179(Top 74%)
24M24.00 mi1.00 mi3424-733221-603221-605714(Top 20%)4739(Top 29%)4739(Top 84%)
40K24.85 mi0.85 mi3462-383246-253246-255363(Top 19%)4464(Top 28%)4464(Top 79%)
25.2M25.20 mi0.35 mi3488-263264-183264-186029(Top 21%)4755(Top 30%)4755(Top 84%)
Finish26.22 mi1.02 mi3564-763325-613325-615934(Top 21%)4692(Top 29%)4692(Top 83%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2654

Males

2531

M18-39

2531

5K→10K

3.1 - 6.2 mi

Top 8%
×5stories
+79ft-138ft

Overall

2348

Males

2247

M18-39

2247

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2654

Males

2531

M18-39

2531

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2915

Males

2777

M18-39

2777

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3550

Males

3366

M18-39

3366

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

4002

Males

3734

M18-39

3734

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

5180

Males

4688

M18-39

4688

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

5066

Males

4533

M18-39

4533

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5384

Males

4654

M18-39

4654

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4771

Males

4214

M18-39

4214

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4803

Males

4179

M18-39

4179

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5714

Males

4739

M18-39

4739

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5363

Males

4464

M18-39

4464

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

6029

Males

4755

M18-39

4755

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

5934

Males

4692

M18-39

4692

Passing Analysis

Category:
Athletes Passed
474
Passed By
1825
Net Change
-1351
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2213
5K → 10K92135-43#2213#2256
10K → 15K44165-121#2256#2377
15K → 20K39164-125#2377#2502
20K → Half450-46#2502#2548
Half → 25K24225-201#2548#2749
25K → 30K31392-361#2749#3110
30K → 20M33118-85#3110#3195
20M → 21M26126-100#3195#3295
21M → 35K2856-28#3295#3323
35K → 23M5381-28#3323#3351
23M → 24M28101-73#3351#3424
24M → 40K2967-38#3424#3462
40K → 25.2M1945-26#3462#3488
25.2M → Finish24100-76#3488#3564
TOTALS4741825-1351
📊

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