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BOSTON MARATHON 2025

Krzysztof Bronisz

Bib: 23103•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Top 42%
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
8:10/mi
25:21
↑ 97↓ 3451.5%
10K· 6.21 mi
8:18/mi
51:09
↑ 79↓ 1380.4%
15K· 9.32 mi
8:11/mi
1:16:33
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:42:17
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:47:52
↑ 19↓ 370.5%
25K· 15.53 mi
8:26/mi
2:08:18
↑ 66↓ 880.2%
30K· 18.64 mi
9:00/mi
2:36:16
↑ 181↓ 1480.2%
20M
9:06/mi
2:48:38
↑ 64↓ 500.2%
21M
10:29/mi
2:59:07
↑ 106↓ 241.6%
35K· 21.75 mi
9:29/mi
3:06:13
↑ 17↓ 861.7%
23M
9:01/mi
3:17:30
↑ 23↓ 630.6%
24M
8:37/mi
3:26:07
↓ 821.3%
40K· 24.85 mi
9:48/mi
3:34:30
↓ 200.3%
25.2M
10:12/mi
3:38:01
↑ 13↓ 160.2%
Finish· 26.22 mi
8:42/mi
3:46:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:52
Pace8:14 /mi
2nd Half
Distance13.11 mi
Time1:59:01
Pace9:05 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:5125:218:1025:21
8:10
-
10K
6.21 mi11:47:3951:098:1425:48
8:18
+0:08
15K
9.32 mi12:13:031:16:338:1325:24
8:11
-0:07
20K
12.43 mi12:38:471:42:178:1425:44
8:17
+0:06
Half
13.11 mi12:44:221:47:528:145:35
8:11
-0:06
25K
15.53 mi13:04:482:08:188:1620:26
8:26
+0:15
30K
18.64 mi13:32:462:36:168:2327:58
9:00
+0:34
20M
20.00 mi13:45:082:48:388:2612:22
9:06
+0:06
21M
21.00 mi13:55:372:59:078:3210:29
10:29
+1:23
35K
21.75 mi14:02:433:06:138:347:06
9:29
-1:00
23M
23.00 mi14:14:003:17:308:3511:17
9:01
-0:28
24M
24.00 mi14:22:373:26:078:358:37
8:37
-0:24
40K
24.85 mi14:31:003:34:308:388:23
9:48
+1:11
25.2M
25.20 mi14:34:313:38:018:393:31
10:12
+0:24
Finish
26.22 mi14:43:233:46:538:408:52
8:42
-1:30

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

8:10 /mi

Average Pace

8:40 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:52

48% of race

Time at Steady Pace

1:17:10

34% of race

Time at Slower Pace

41:51

18% of race

Average Pace: 8:39 /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 mi11:21:5125:218:1025:21
8:10
#17811
10K
6.21 mi11:47:3951:098:1425:48
8:18
#18185
15K
9.32 mi12:13:031:16:338:1325:24
8:11
#17831
20K
12.43 mi12:38:471:42:178:1425:44
8:17
#17544
Half
13.11 mi12:44:221:47:528:145:35
8:11
#17517
25K
15.53 mi13:04:482:08:188:1620:26
8:26
#17337
30K
18.64 mi13:32:462:36:168:2327:58
9:00
#17358
20M
20.00 mi13:45:082:48:388:2612:22
9:06
#17337
21M
21.00 mi13:55:372:59:078:3210:29
10:29
#17541
35K
21.75 mi14:02:433:06:138:347:06
9:29
#17684
23M
23.00 mi14:14:003:17:308:3511:17
9:01
#17581
24M
24.00 mi14:22:373:26:078:358:37
8:37
#17467
40K
24.85 mi14:31:003:34:308:388:23
9:48
#17579
25.2M
25.20 mi14:34:313:38:018:393:31
10:12
#17579
Finish
26.22 mi14:43:233:46:538:408:52
8:42
#17564
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17811115311153117227(Top 61%)11313(Top 70%)11313(Top 899%)
10K6.21 mi3.10 mi18185-37411690-15911690-15918572(Top 65%)11881(Top 74%)11881(Top 944%)
15K9.32 mi3.11 mi17831+35411552+13811552+13817227(Top 61%)11313(Top 70%)11313(Top 899%)
20K12.43 mi3.11 mi17544+28711434+11811434+11816832(Top 59%)11105(Top 69%)11105(Top 882%)
Half13.11 mi0.68 mi17517+2711420+1411420+1417142(Top 60%)11243(Top 70%)11243(Top 893%)
25K15.53 mi2.42 mi17337+18011325+9511325+9516729(Top 59%)10979(Top 68%)10979(Top 872%)
30K18.64 mi3.11 mi17358-2111275+5011275+5017697(Top 62%)11235(Top 70%)11235(Top 892%)
20M20.00 mi1.36 mi17337+2111242+3311242+3317301(Top 61%)10946(Top 68%)10946(Top 869%)
21M21.00 mi1.00 mi17541-20411300-5811300-5819934(Top 70%)12007(Top 75%)12007(Top 954%)
35K21.75 mi0.75 mi17684-14311353-5311353-5320278(Top 71%)12098(Top 75%)12098(Top 961%)
23M23.00 mi1.25 mi17581+10311262+9111262+9116324(Top 57%)10212(Top 63%)10212(Top 811%)
24M24.00 mi1.00 mi17467+11411191+7111191+7115251(Top 54%)9704(Top 60%)9704(Top 771%)
40K24.85 mi0.85 mi17579-11211211-2011211-2019810(Top 70%)11709(Top 73%)11709(Top 930%)
25.2M25.20 mi0.35 mi1757911194+1711194+1717839(Top 63%)10741(Top 67%)10741(Top 853%)
Finish26.22 mi1.02 mi17564+1511173+2111173+2117461(Top 61%)10623(Top 66%)10623(Top 844%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

17227

Males

11313

M60-64

11313

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

18572

Males

11881

M60-64

11881

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

17227

Males

11313

M60-64

11313

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16832

Males

11105

M60-64

11105

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17142

Males

11243

M60-64

11243

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

16729

Males

10979

M60-64

10979

25K→30K

15.5 - 18.6 mi

Top 62%
×9story building
+181ft-148ft

Overall

17697

Males

11235

M60-64

11235

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17301

Males

10946

M60-64

10946

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

19934

Males

12007

M60-64

12007

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20278

Males

12098

M60-64

12098

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16324

Males

10212

M60-64

10212

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15251

Males

9704

M60-64

9704

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

19810

Males

11709

M60-64

11709

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17839

Males

10741

M60-64

10741

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

17461

Males

10623

M60-64

10623

Passing Analysis

Category:
Athletes Passed
2046
Passed By
1799
Net Change
+247
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17811
5K → 10K151525-374#17811#18185
10K → 15K40450+354#18185#17831
15K → 20K34154+287#17831#17544
20K → Half4417+27#17544#17517
Half → 25K25777+180#17517#17337
25K → 30K211232-21#17337#17358
30K → 20M11998+21#17358#17337
20M → 21M58262-204#17337#17541
21M → 35K35178-143#17541#17684
35K → 23M16057+103#17684#17581
23M → 24M13824+114#17581#17467
24M → 40K36148-112#17467#17579
40K → 25.2M28280#17579#17579
25.2M → Finish6449+15#17579#17564
TOTALS20461799+247
📊

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