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BOSTON MARATHON 2025

Casper Andersen

Bib: 2108•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 5%
Division (M18-39)
#0 / 5642
Top 12%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:03
Rank: #630
Start → 5K
18:03 | 5:49/mi
10K· 6.21 mi
36:27
Rank: #727 (-97)
5K → 10K
18:24 | 5:55/mi
15K· 9.32 mi
54:43
Rank: #718 (+9)
10K → 15K
18:16 | 5:53/mi
20K· 12.43 mi
1:13:16
Rank: #728 (-10)
15K → 20K
18:33 | 5:58/mi
Half· 13.11 mi
1:17:14
Rank: #721 (+7)
20K → Half
3:58 | 5:49/mi
25K· 15.53 mi
1:31:49
Rank: #726 (-5)
Half → 25K
14:35 | 6:01/mi
30K· 18.64 mi
1:50:57
Rank: #722 (+4)
25K → 30K
19:08 | 6:10/mi
20M
1:59:38
Rank: #730 (-8)
30K → 20M
8:41 | 6:23/mi
21M
2:06:14
Rank: #725 (+5)
20M → 21M
6:36 | 6:36/mi
35K· 21.75 mi
2:10:52
Rank: #727 (-2)
21M → 35K
4:38 | 6:12/mi
23M
2:19:01
Rank: #740 (-13)
35K → 23M
8:09 | 6:31/mi
24M
2:25:30
Rank: #762 (-22)
23M → 24M
6:29 | 6:29/mi
40K· 24.85 mi
2:31:11
Rank: #789 (-27)
24M → 40K
5:41 | 6:39/mi
25.2M
2:33:41
Rank: #793 (-4)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
2:40:09
Rank: #821 (-28)
25.2M → Finish
6:28 | 6:21/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:14
Pace5:53 /mi
2nd Half
Distance13.11 mi
Time1:22:55
Pace6:20 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:5018:035:4918:03
5:49
-
10K
6.21 mi10:37:1436:275:5218:24
5:55
+0:06
15K
9.32 mi10:55:3054:435:5218:16
5:53
-0:02
20K
12.43 mi11:14:031:13:165:5418:33
5:58
+0:05
Half
13.11 mi11:18:011:17:145:533:58
5:49
-0:09
25K
15.53 mi11:32:361:31:495:5514:35
6:01
+0:12
30K
18.64 mi11:51:441:50:575:5719:08
6:10
+0:09
20M
20.00 mi12:00:251:59:385:598:41
6:23
+0:13
21M
21.00 mi12:07:012:06:146:016:36
6:36
+0:13
35K
21.75 mi12:11:392:10:526:014:38
6:12
-0:24
23M
23.00 mi12:19:482:19:016:038:09
6:31
+0:19
24M
24.00 mi12:26:172:25:306:046:29
6:29
-0:02
40K
24.85 mi12:31:582:31:116:055:41
6:39
+0:10
25.2M
25.20 mi12:34:282:33:416:062:30
7:15
+0:36
Finish
26.22 mi12:40:562:40:096:076:28
6:21
-0:54

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

5:49 /mi

Average Pace

6:07 /mi

Slowest Pace

7:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:14

48% of race

Time at Steady Pace

53:30

33% of race

Time at Slower Pace

29:25

18% of race

Average Pace: 6:06 /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 mi10:18:5018:035:4918:03
5:49
#630
10K
6.21 mi10:37:1436:275:5218:24
5:55
#727
15K
9.32 mi10:55:3054:435:5218:16
5:53
#718
20K
12.43 mi11:14:031:13:165:5418:33
5:58
#728
Half
13.11 mi11:18:011:17:145:533:58
5:49
#721
25K
15.53 mi11:32:361:31:495:5514:35
6:01
#726
30K
18.64 mi11:51:441:50:575:5719:08
6:10
#722
20M
20.00 mi12:00:251:59:385:598:41
6:23
#730
21M
21.00 mi12:07:012:06:146:016:36
6:36
#725
35K
21.75 mi12:11:392:10:526:014:38
6:12
#727
23M
23.00 mi12:19:482:19:016:038:09
6:31
#740
24M
24.00 mi12:26:172:25:306:046:29
6:29
#762
40K
24.85 mi12:31:582:31:116:055:41
6:39
#789
25.2M
25.20 mi12:34:282:33:416:062:30
7:15
#793
Finish
26.22 mi12:40:562:40:096:076:28
6:21
#821
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi630583583717(Top 3%)669(Top 4%)669(Top 12%)
10K6.21 mi3.10 mi727-97677-94677-94887(Top 3%)834(Top 5%)834(Top 15%)
15K9.32 mi3.11 mi718+9670+7670+7717(Top 3%)669(Top 4%)669(Top 12%)
20K12.43 mi3.11 mi728-10679-9679-9805(Top 3%)756(Top 5%)756(Top 13%)
Half13.11 mi0.68 mi721+7672+7672+7623(Top 2%)584(Top 4%)584(Top 10%)
25K15.53 mi2.42 mi726-5678-6678-6843(Top 3%)790(Top 5%)790(Top 14%)
30K18.64 mi3.11 mi722+4675+3675+3807(Top 3%)756(Top 5%)756(Top 13%)
20M20.00 mi1.36 mi730-8683-8683-81195(Top 4%)1126(Top 7%)1126(Top 20%)
21M21.00 mi1.00 mi725+5677+6677+6902(Top 3%)852(Top 5%)852(Top 15%)
35K21.75 mi0.75 mi727-2679-2679-21176(Top 4%)1107(Top 7%)1107(Top 20%)
23M23.00 mi1.25 mi740-13691-12691-121466(Top 5%)1376(Top 9%)1376(Top 24%)
24M24.00 mi1.00 mi762-22713-22713-221943(Top 7%)1800(Top 11%)1800(Top 32%)
40K24.85 mi0.85 mi789-27737-24737-242123(Top 7%)1949(Top 12%)1949(Top 35%)
25.2M25.20 mi0.35 mi793-4741-4741-42258(Top 8%)2011(Top 12%)2011(Top 36%)
Finish26.22 mi1.02 mi821-28767-26767-262047(Top 7%)1874(Top 12%)1874(Top 33%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21stories
+97ft-345ft

Overall

717

Males

669

M18-39

669

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

887

Males

834

M18-39

834

10K→15K

6.2 - 9.3 mi

Top 3%
×3stories
+67ft-78ft

Overall

717

Males

669

M18-39

669

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

805

Males

756

M18-39

756

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

623

Males

584

M18-39

584

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

843

Males

790

M18-39

790

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

807

Males

756

M18-39

756

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1195

Males

1126

M18-39

1126

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

902

Males

852

M18-39

852

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1176

Males

1107

M18-39

1107

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1466

Males

1376

M18-39

1376

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1943

Males

1800

M18-39

1800

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

2123

Males

1949

M18-39

1949

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2258

Males

2011

M18-39

2011

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

2047

Males

1874

M18-39

1874

Passing Analysis

Category:
Athletes Passed
210
Passed By
401
Net Change
-191
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#630
5K → 10K8105-97#630#727
10K → 15K2617+9#727#718
15K → 20K2333-10#718#728
20K → Half81+7#728#721
Half → 25K2631-5#721#726
25K → 30K3834+4#726#722
30K → 20M1220-8#722#730
20M → 21M1914+5#730#725
21M → 35K1416-2#725#727
35K → 23M1225-13#727#740
23M → 24M830-22#740#762
24M → 40K633-27#762#789
40K → 25.2M37-4#789#793
25.2M → Finish735-28#793#821
TOTALS210401-191
📊

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