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BOSTON MARATHON 2025

Jasper Kroehnert

Bib: 1551•M

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:19/mi
25:49
↑ 97↓ 3451.5%
10K· 6.21 mi
8:29/mi
52:10
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:18:10
↑ 67↓ 78
20K· 12.43 mi
8:20/mi
1:44:02
↑ 106↓ 860.1%
Half· 13.11 mi
8:15/mi
1:49:40
↑ 19↓ 370.5%
25K· 15.53 mi
8:20/mi
2:09:52
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:36:21
↑ 181↓ 1480.2%
20M
8:45/mi
2:48:15
↑ 64↓ 500.2%
21M
9:02/mi
2:57:17
↑ 106↓ 241.6%
35K· 21.75 mi
8:04/mi
3:03:19
↑ 17↓ 861.7%
23M
8:34/mi
3:14:03
↑ 23↓ 630.6%
24M
8:38/mi
3:22:41
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:30:02
↓ 200.3%
25.2M
9:23/mi
3:33:16
↑ 13↓ 160.2%
Finish· 26.22 mi
7:49/mi
3:41:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:40
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time1:51:34
Pace8:31 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0425:498:1925:49
8:19
-
10K
6.21 mi11:18:2552:108:2426:21
8:29
+0:10
15K
9.32 mi11:44:251:18:108:2326:00
8:22
-0:07
20K
12.43 mi12:10:171:44:028:2225:52
8:20
-0:02
Half
13.11 mi12:15:551:49:408:225:38
8:15
-0:05
25K
15.53 mi12:36:072:09:528:2220:12
8:20
+0:05
30K
18.64 mi13:02:362:36:218:2326:29
8:31
+0:11
20M
20.00 mi13:14:302:48:158:2511:54
8:45
+0:14
21M
21.00 mi13:23:322:57:178:279:02
9:02
+0:17
35K
21.75 mi13:29:343:03:198:266:02
8:04
-0:58
23M
23.00 mi13:40:183:14:038:2610:44
8:34
+0:30
24M
24.00 mi13:48:563:22:418:278:38
8:38
+0:04
40K
24.85 mi13:56:173:30:028:277:21
8:36
-0:02
25.2M
25.20 mi13:59:313:33:168:283:14
9:23
+0:47
Finish
26.22 mi14:07:293:41:148:277:58
7:49
-1:34

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

7:49 /mi

Average Pace

8:27 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

19:38

9% of race

Time at Steady Pace

2:57:26

80% of race

Time at Slower Pace

24:10

11% of race

Average Pace: 8:26 /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 mi10:52:0425:498:1925:49
8:19
#18765
10K
6.21 mi11:18:2552:108:2426:21
8:29
#19207
15K
9.32 mi11:44:251:18:108:2326:00
8:22
#18946
20K
12.43 mi12:10:171:44:028:2225:52
8:20
#18459
Half
13.11 mi12:15:551:49:408:225:38
8:15
#18408
25K
15.53 mi12:36:072:09:528:2220:12
8:20
#17981
30K
18.64 mi13:02:362:36:218:2326:29
8:31
#17389
20M
20.00 mi13:14:302:48:158:2511:54
8:45
#17210
21M
21.00 mi13:23:322:57:178:279:02
9:02
#16954
35K
21.75 mi13:29:343:03:198:266:02
8:04
#16802
23M
23.00 mi13:40:183:14:038:2610:44
8:34
#16587
24M
24.00 mi13:48:563:22:418:278:38
8:38
#16520
40K
24.85 mi13:56:173:30:028:277:21
8:36
#16397
25.2M
25.20 mi13:59:313:33:168:283:14
9:23
#16358
Finish
26.22 mi14:07:293:41:148:277:58
7:49
#16180
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi18765119301193018491(Top 65%)11833(Top 73%)11833(Top 210%)
10K6.21 mi3.10 mi19207-44212139-20912139-20919677(Top 69%)12328(Top 77%)12328(Top 219%)
15K9.32 mi3.11 mi18946+26112012+12712012+12718491(Top 65%)11833(Top 73%)11833(Top 210%)
20K12.43 mi3.11 mi18459+48711808+20411808+20417076(Top 60%)11211(Top 70%)11211(Top 199%)
Half13.11 mi0.68 mi18408+5111789+1911789+1917593(Top 62%)11435(Top 71%)11435(Top 203%)
25K15.53 mi2.42 mi17981+42711584+20511584+20516108(Top 57%)10691(Top 66%)10691(Top 189%)
30K18.64 mi3.11 mi17389+59211286+29811286+29814906(Top 52%)10017(Top 62%)10017(Top 178%)
20M20.00 mi1.36 mi17210+17911187+9911187+9915407(Top 54%)10101(Top 63%)10101(Top 179%)
21M21.00 mi1.00 mi16954+25611054+13311054+13313707(Top 48%)9206(Top 57%)9206(Top 163%)
35K21.75 mi0.75 mi16802+15210983+7110983+7112689(Top 45%)8675(Top 54%)8675(Top 154%)
23M23.00 mi1.25 mi16587+21510856+12710856+12713750(Top 48%)9051(Top 56%)9051(Top 160%)
24M24.00 mi1.00 mi16520+6710803+5310803+5315341(Top 54%)9736(Top 60%)9736(Top 173%)
40K24.85 mi0.85 mi16397+12310722+8110722+8114019(Top 49%)9011(Top 56%)9011(Top 160%)
25.2M25.20 mi0.35 mi16358+3910695+2710695+2713854(Top 49%)8888(Top 55%)8888(Top 158%)
Finish26.22 mi1.02 mi16180+17810606+8910606+8911561(Top 41%)7806(Top 48%)7806(Top 138%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18491

Males

11833

M18-39

11833

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

19677

Males

12328

M18-39

12328

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18491

Males

11833

M18-39

11833

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17076

Males

11211

M18-39

11211

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

17593

Males

11435

M18-39

11435

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16108

Males

10691

M18-39

10691

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

14906

Males

10017

M18-39

10017

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

15407

Males

10101

M18-39

10101

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

13707

Males

9206

M18-39

9206

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

12689

Males

8675

M18-39

8675

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13750

Males

9051

M18-39

9051

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15341

Males

9736

M18-39

9736

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

14019

Males

9011

M18-39

9011

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13854

Males

8888

M18-39

8888

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11561

Males

7806

M18-39

7806

Passing Analysis

Category:
Athletes Passed
3439
Passed By
854
Net Change
+2585
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18765
5K → 10K117559-442#18765#19207
10K → 15K34685+261#19207#18946
15K → 20K51023+487#18946#18459
20K → Half6413+51#18459#18408
Half → 25K44013+427#18408#17981
25K → 30K61018+592#17981#17389
30K → 20M20627+179#17389#17210
20M → 21M26610+256#17210#16954
21M → 35K1531+152#16954#16802
35K → 23M23116+215#16802#16587
23M → 24M10841+67#16587#16520
24M → 40K14320+123#16520#16397
40K → 25.2M5314+39#16397#16358
25.2M → Finish19214+178#16358#16180
TOTALS3439854+2585
📊

Passing Visuals

Category:
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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