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BOSTON MARATHON 2025

Casey Kropka

OH

Bib: 1421 M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 11%
Gender (Male)
#0 / 16105
Top 18%
Division (M18-39)
#0 / 5642
Top 40%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
6:18/mi
19:33
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:15/mi
38:58
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:20/mi
58:40
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:14/mi
1:18:02
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:09/mi
1:22:14
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:13/mi
1:37:18
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
6:28/mi
1:57:25
↑ 181↓ 1480.2%
138 ft elev
20M
6:51/mi
2:06:44
↑ 64↓ 500.2%
148 ft elev
21M
7:16/mi
2:14:00
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:48/mi
2:19:05
↑ 17↓ 861.7%
156 ft elev
23M
7:34/mi
2:28:33
↑ 23↓ 630.6%
116 ft elev
24M
7:49/mi
2:36:22
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:09/mi
2:44:11
↓ 200.3%
20 ft elev
25.2M
9:23/mi
2:47:25
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:36/mi
2:54:09
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:22:146:16 /mi⚡ faster
2nd Half
1:31:557:01 /mi+11.8%
Positive split — 11.8% slower in the second half
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Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:1319:336:1819:33
6:18
-
10K
6.21 mi10:39:3838:586:1619:25
6:15
-0:03
15K
9.32 mi10:59:2058:406:1819:42
6:20
+0:05
20K
12.43 mi11:18:421:18:026:1719:22
6:14
-0:06
Half
13.11 mi11:22:541:22:146:164:12
6:09
-0:05
25K
15.53 mi11:37:581:37:186:1615:04
6:13
+0:04
30K
18.64 mi11:58:051:57:256:1820:07
6:28
+0:15
20M
20.00 mi12:07:242:06:446:209:19
6:51
+0:23
21M
21.00 mi12:14:402:14:006:237:16
7:16
+0:25
35K
21.75 mi12:19:452:19:056:245:05
6:48
-0:28
23M
23.00 mi12:29:132:28:336:289:28
7:34
+0:46
24M
24.00 mi12:37:022:36:226:317:49
7:49
+0:15
40K
24.85 mi12:44:512:44:116:367:49
9:09
+1:20
25.2M
25.20 mi12:48:052:47:256:393:14
9:23
+0:14
Finish
26.22 mi12:54:492:54:096:396:44
6:36
-2:47

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

6:09 /mi

Average Pace

6:39 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:18:33

80% of race

Time at Slower Pace

35:36

20% of race

Average Pace: 6:39 /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 mi10:20:1319:336:1819:33
6:18
#2397
10K
6.21 mi10:39:3838:586:1619:25
6:15
#2243
15K
9.32 mi10:59:2058:406:1819:42
6:20
#2339
20K
12.43 mi11:18:421:18:026:1719:22
6:14
#2144
Half
13.11 mi11:22:541:22:146:164:12
6:09
#2129
25K
15.53 mi11:37:581:37:186:1615:04
6:13
#2015
30K
18.64 mi11:58:051:57:256:1820:07
6:28
#1938
20M
20.00 mi12:07:242:06:446:209:19
6:51
#2006
21M
21.00 mi12:14:402:14:006:237:16
7:16
#2062
35K
21.75 mi12:19:452:19:056:245:05
6:48
#2110
23M
23.00 mi12:29:132:28:336:289:28
7:34
#2303
24M
24.00 mi12:37:022:36:226:317:49
7:49
#2544
40K
24.85 mi12:44:512:44:116:367:49
9:09
#2934
25.2M
25.20 mi12:48:052:47:256:393:14
9:23
#3054
Finish
26.22 mi12:54:492:54:096:396:44
6:36
#3027
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi239722832283258524682468
10K6.21 mi3.10 mi2243+1542141+1422141+142214820512051
15K9.32 mi3.11 mi2339-962234-932234-93258524682468
20K12.43 mi3.11 mi2144+1952046+1882046+188171416301630
Half13.11 mi0.68 mi2129+152033+132033+13177316891689
25K15.53 mi2.42 mi2015+1141920+1131920+113151614411441
30K18.64 mi3.11 mi1938+771846+741846+74187717871787
20M20.00 mi1.36 mi2006-681911-651911-65322129772977
21M21.00 mi1.00 mi2062-561962-511962-51343531473147
35K21.75 mi0.75 mi2110-482009-472009-47402736023602
23M23.00 mi1.25 mi2303-1932195-1862195-186695355485548
24M24.00 mi1.00 mi2544-2412416-2212416-221987870877087
40K24.85 mi0.85 mi2934-3902774-3582774-358170371037810378
25.2M25.20 mi0.35 mi3054-1202880-1062880-1061374987838783
Finish26.22 mi1.02 mi3027+272854+262854+26335629402940

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21story building
+97ft-345ft

Overall

2585

Males

2468

M18-39

2468

5K→10K

3.1 - 6.2 mi

Top 8%
×5story building
+79ft-138ft

Overall

2148

Males

2051

M18-39

2051

10K→15K

6.2 - 9.3 mi

Top 9%
×3story building
+67ft-78ft

Overall

2585

Males

2468

M18-39

2468

15K→20K

9.3 - 12.4 mi

Top 6%
×5story building
+106ft-86ft

Overall

1714

Males

1630

M18-39

1630

20K→Half

12.4 - 13.1 mi

Top 6%
×2story building
+19ft-37ft

Overall

1773

Males

1689

M18-39

1689

Half→25K

13.1 - 15.5 mi

Top 5%
×4story building
+66ft-88ft

Overall

1516

Males

1441

M18-39

1441

25K→30K

15.5 - 18.6 mi

Top 7%
×9story building
+181ft-148ft

Overall

1877

Males

1787

M18-39

1787

30K→20M

18.6 - 20.0 mi

Top 11%
×5story building
+64ft-50ft

Overall

3221

Males

2977

M18-39

2977

20M→21M

20.0 - 21.0 mi

Top 12%
×8story building
+106ft-24ft

Overall

3435

Males

3147

M18-39

3147

21M→35K

21.0 - 21.8 mi

Top 14%
×7story building
+17ft-86ft

Overall

4027

Males

3602

M18-39

3602

35K→23M

21.8 - 23.0 mi

Top 24%
×5story building
+23ft-63ft

Overall

6953

Males

5548

M18-39

5548

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9878

Males

7087

M18-39

7087

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17037

Males

10378

M18-39

10378

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13749

Males

8783

M18-39

8783

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2story building
+22ft-21ft

Overall

3356

Males

2940

M18-39

2940

Passing Analysis

Category:
Athletes Passed
828
Passed By
1458
Net Change
-630
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2397
5K → 10K20349+154#2397#2243
10K → 15K43139-96#2243#2339
15K → 20K2016+195#2339#2144
20K → Half227+15#2144#2129
Half → 25K1206+114#2129#2015
25K → 30K10730+77#2015#1938
30K → 20M1583-68#1938#2006
20M → 21M2177-56#2006#2062
21M → 35K1563-48#2062#2110
35K → 23M14207-193#2110#2303
23M → 24M11252-241#2303#2544
24M → 40K2392-390#2544#2934
40K → 25.2M3123-120#2934#3054
25.2M → Finish5124+27#3054#3027
TOTALS8281458-630

Passing Charts

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