Boston Marathon logo
BOSTON MARATHON 2025

Casey Klein

Bib: 28571•M

PA

0:00
0:00
/ mi
Be the first to cheer!
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
26:16
Rank: #19619
Start → 5K
26:16 | 8:27/mi
10K· 6.21 mi
51:40
Rank: #18710 (+909)
5K → 10K
25:24 | 8:11/mi
15K· 9.32 mi
1:18:16
Rank: #19007 (-297)
10K → 15K
26:36 | 8:34/mi
20K· 12.43 mi
1:45:22
Rank: #19133 (-126)
15K → 20K
27:06 | 8:43/mi
Half· 13.11 mi
1:51:15
Rank: #19172 (-39)
20K → Half
5:53 | 8:37/mi
25K· 15.53 mi
2:15:37
Rank: #20245 (-1073)
Half → 25K
24:22 | 10:03/mi
30K· 18.64 mi
3:00:58
Rank: #23430 (-3185)
25K → 30K
45:21 | 14:36/mi
20M
3:18:46
Rank: #23846 (-416)
30K → 20M
17:48 | 13:06/mi
21M
3:32:13
Rank: #24007 (-161)
20M → 21M
13:27 | 13:27/mi
35K· 21.75 mi
3:41:24
Rank: #24119 (-112)
21M → 35K
9:11 | 12:17/mi
23M
3:57:54
Rank: #24351 (-232)
35K → 23M
16:30 | 13:11/mi
24M
4:09:48
Rank: #24436 (-85)
23M → 24M
11:54 | 11:54/mi
40K· 24.85 mi
4:20:23
Rank: #24496 (-60)
24M → 40K
10:35 | 12:23/mi
25.2M
4:24:37
Rank: #24491 (+5)
40K → 25.2M
4:14 | 12:17/mi
Finish· 26.22 mi
4:36:06
Rank: #24539 (-48)
25.2M → Finish
11:29 | 11:16/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:15
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time2:44:51
Pace12:35 /mi
📊Positive Split: 48.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:4526:168:2726:16
8:27
-
10K
6.21 mi12:09:0951:408:1925:24
8:11
-0:16
15K
9.32 mi12:35:451:18:168:2426:36
8:34
+0:23
20K
12.43 mi13:02:511:45:228:2927:06
8:43
+0:09
Half
13.11 mi13:08:441:51:158:295:53
8:37
-0:06
25K
15.53 mi13:33:062:15:378:4424:22
10:03
+1:26
30K
18.64 mi14:18:273:00:589:4245:21
14:36
+4:33
20M
20.00 mi14:36:153:18:469:5617:48
13:06
-1:30
21M
21.00 mi14:49:423:32:1310:0613:27
13:27
+0:21
35K
21.75 mi14:58:533:41:2410:119:11
12:17
-1:10
23M
23.00 mi15:15:233:57:5410:2116:30
13:11
+0:54
24M
24.00 mi15:27:174:09:4810:2511:54
11:54
-1:17
40K
24.85 mi15:37:524:20:2310:2910:35
12:23
+0:29
25.2M
25.20 mi15:42:064:24:3710:304:14
12:17
-0:06
Finish
26.22 mi15:53:354:36:0610:3211:29
11:16
-1:01

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

8:11 /mi

Average Pace

10:32 /mi

Slowest Pace

14:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:37

49% of race

Time at Steady Pace

47:23

17% of race

Time at Slower Pace

1:33:06

34% of race

Average Pace: 10:32 /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 mi11:43:4526:168:2726:16
8:27
#19619
10K
6.21 mi12:09:0951:408:1925:24
8:11
#18710
15K
9.32 mi12:35:451:18:168:2426:36
8:34
#19007
20K
12.43 mi13:02:511:45:228:2927:06
8:43
#19133
Half
13.11 mi13:08:441:51:158:295:53
8:37
#19172
25K
15.53 mi13:33:062:15:378:4424:22
10:03
#20245
30K
18.64 mi14:18:273:00:589:4245:21
14:36
#23430
20M
20.00 mi14:36:153:18:469:5617:48
13:06
#23846
21M
21.00 mi14:49:423:32:1310:0613:27
13:27
#24007
35K
21.75 mi14:58:533:41:2410:119:11
12:17
#24119
23M
23.00 mi15:15:233:57:5410:2116:30
13:11
#24351
24M
24.00 mi15:27:174:09:4810:2511:54
11:54
#24436
40K
24.85 mi15:37:524:20:2310:2910:35
12:23
#24496
25.2M
25.20 mi15:42:064:24:3710:304:14
12:17
#24491
Finish
26.22 mi15:53:354:36:0610:3211:29
11:16
#24539
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi19619122951229519701(Top 69%)12374(Top 77%)12374(Top 219%)
10K6.21 mi3.10 mi18710+90911916+37911916+37917718(Top 62%)11541(Top 72%)11541(Top 205%)
15K9.32 mi3.11 mi19007-29712038-12212038-12219701(Top 69%)12374(Top 77%)12374(Top 219%)
20K12.43 mi3.11 mi19133-12612098-6012098-6019529(Top 69%)12259(Top 76%)12259(Top 217%)
Half13.11 mi0.68 mi19172-3912112-1412112-1419927(Top 70%)12454(Top 77%)12454(Top 221%)
25K15.53 mi2.42 mi20245-107312560-44812560-44823380(Top 82%)13910(Top 86%)13910(Top 247%)
30K18.64 mi3.11 mi23430-318513951-139113951-139127855(Top 98%)15804(Top 98%)15804(Top 280%)
20M20.00 mi1.36 mi23846-41614119-16814119-16826544(Top 93%)15166(Top 94%)15166(Top 269%)
21M21.00 mi1.00 mi24007-16114171-5214171-5225608(Top 90%)14679(Top 91%)14679(Top 260%)
35K21.75 mi0.75 mi24119-11214225-5414225-5426218(Top 92%)14944(Top 93%)14944(Top 265%)
23M23.00 mi1.25 mi24351-23214314-8914314-8926588(Top 94%)15126(Top 94%)15126(Top 268%)
24M24.00 mi1.00 mi24436-8514339-2514339-2525539(Top 90%)14577(Top 91%)14577(Top 258%)
40K24.85 mi0.85 mi24496-6014352-1314352-1325486(Top 90%)14517(Top 90%)14517(Top 257%)
25.2M25.20 mi0.35 mi24491+514346+614346+623754(Top 84%)13647(Top 85%)13647(Top 242%)
Finish26.22 mi1.02 mi24539-4814357-1114357-1125819(Top 91%)14694(Top 91%)14694(Top 260%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

19701

Males

12374

M18-39

12374

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

17718

Males

11541

M18-39

11541

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

19701

Males

12374

M18-39

12374

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

19529

Males

12259

M18-39

12259

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19927

Males

12454

M18-39

12454

Half→25K

13.1 - 15.5 mi

Top 82%
×4stories
+66ft-88ft

Overall

23380

Males

13910

M18-39

13910

25K→30K

15.5 - 18.6 mi

Top 98%
×9stories
+181ft-148ft

Overall

27855

Males

15804

M18-39

15804

30K→20M

18.6 - 20.0 mi

Top 93%
×5stories
+64ft-50ft

Overall

26544

Males

15166

M18-39

15166

20M→21M

20.0 - 21.0 mi

Top 90%
×8stories
+106ft-24ft

Overall

25608

Males

14679

M18-39

14679

21M→35K

21.0 - 21.8 mi

Top 92%
×7stories
+17ft-86ft

Overall

26218

Males

14944

M18-39

14944

35K→23M

21.8 - 23.0 mi

Top 94%
×5stories
+23ft-63ft

Overall

26588

Males

15126

M18-39

15126

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

25539

Males

14577

M18-39

14577

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

25486

Males

14517

M18-39

14517

40K→25.2M

24.9 - 25.2 mi

Top 84%
×1story
+13ft-16ft

Overall

23754

Males

13647

M18-39

13647

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2stories
+22ft-21ft

Overall

25819

Males

14694

M18-39

14694

Passing Analysis

Category:
Athletes Passed
1414
Passed By
6334
Net Change
-4920
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19619
5K → 10K95445+909#19619#18710
10K → 15K108405-297#18710#19007
15K → 20K152278-126#19007#19133
20K → Half2564-39#19133#19172
Half → 25K221095-1073#19172#20245
25K → 30K83193-3185#20245#23430
30K → 20M16432-416#23430#23846
20M → 21M22183-161#23846#24007
21M → 35K11123-112#24007#24119
35K → 23M23255-232#24119#24351
23M → 24M26111-85#24351#24436
24M → 40K1676-60#24436#24496
40K → 25.2M1510+5#24496#24491
25.2M → Finish1664-48#24491#24539
TOTALS14146334-4920
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing