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BOSTON MARATHON 2025

Katherine Kowalchek

MA

Bib: 26600 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
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
9:40/mi
30:03
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:50/mi
57:30
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:50/mi
1:24:57
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:32/mi
1:54:33
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:14/mi
2:00:51
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:24/mi
2:23:39
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
10:02/mi
2:54:50
↑ 181↓ 1480.2%
138 ft elev
20M
10:23/mi
3:08:56
↑ 64↓ 500.2%
148 ft elev
21M
11:07/mi
3:20:03
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
16:17/mi
3:32:14
↑ 17↓ 861.7%
156 ft elev
23M
10:35/mi
3:45:29
↑ 23↓ 630.6%
116 ft elev
24M
11:43/mi
3:57:12
↓ 821.3%
34 ft elev
40K· 24.85 mi
12:17/mi
4:07:42
↓ 200.3%
20 ft elev
25.2M
14:50/mi
4:12:49
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
11:52/mi
4:24:55
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:51
Pace9:13 /mi
2nd Half
Distance13.11 mi
Time2:24:04
Pace10:59 /mi
📊Positive Split: 19.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:0530:039:4030:03
9:40
-
10K
6.21 mi12:13:3257:309:1527:27
8:50
-0:50
15K
9.32 mi12:40:591:24:579:0727:27
8:50
0:00
20K
12.43 mi13:10:351:54:339:1329:36
9:32
+0:42
Half
13.11 mi13:16:532:00:519:136:18
9:14
-0:18
25K
15.53 mi13:39:412:23:399:1522:48
9:24
+0:10
30K
18.64 mi14:10:522:54:509:2331:11
10:02
+0:38
20M
20.00 mi14:24:583:08:569:2714:06
10:23
+0:21
21M
21.00 mi14:36:053:20:039:3211:07
11:07
+0:44
35K
21.75 mi14:48:163:32:149:4612:11
16:17
+5:10
23M
23.00 mi15:01:313:45:299:4813:15
10:35
-5:42
24M
24.00 mi15:13:143:57:129:5311:43
11:43
+1:08
40K
24.85 mi15:23:444:07:429:5810:30
12:17
+0:34
25.2M
25.20 mi15:28:514:12:4910:025:07
14:50
+2:33
Finish
26.22 mi15:40:574:24:5510:0712:06
11:52
-2:58

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

8:50 /mi

Average Pace

10:07 /mi

Slowest Pace

16:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:01:12

23% of race

Time at Steady Pace

2:32:06

57% of race

Time at Slower Pace

51:37

19% of race

Average Pace: 10:06 /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 mi11:46:0530:039:4030:03
9:40
#24770
10K
6.21 mi12:13:3257:309:1527:27
8:50
#23395
15K
9.32 mi12:40:591:24:579:0727:27
8:50
#22769
20K
12.43 mi13:10:351:54:339:1329:36
9:32
#22862
Half
13.11 mi13:16:532:00:519:136:18
9:14
#22859
25K
15.53 mi13:39:412:23:399:1522:48
9:24
#22602
30K
18.64 mi14:10:522:54:509:2331:11
10:02
#22426
20M
20.00 mi14:24:583:08:569:2714:06
10:23
#22398
21M
21.00 mi14:36:053:20:039:3211:07
11:07
#22332
35K
21.75 mi14:48:163:32:149:4612:11
16:17
#22970
23M
23.00 mi15:01:313:45:299:4813:15
10:35
#22896
24M
24.00 mi15:13:143:57:129:5311:43
11:43
#23050
40K
24.85 mi15:23:444:07:429:5810:30
12:17
#23168
25.2M
25.20 mi15:28:514:12:4910:025:07
14:50
#23273
Finish
26.22 mi15:40:574:24:5510:0712:06
11:52
#23479
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi24770100951009521219(Top 75%)8126(Top 66%)8126(Top 448%)
10K6.21 mi3.10 mi23395+13759364+7319364+73121586(Top 76%)8365(Top 68%)8365(Top 461%)
15K9.32 mi3.11 mi22769+6268996+3688996+36821219(Top 75%)8126(Top 66%)8126(Top 448%)
20K12.43 mi3.11 mi22862-939047-519047-5122995(Top 81%)9145(Top 75%)9145(Top 504%)
Half13.11 mi0.68 mi22859+39046+19046+122772(Top 80%)9026(Top 74%)9026(Top 498%)
25K15.53 mi2.42 mi22602+2578925+1218925+12121565(Top 76%)8406(Top 69%)8406(Top 464%)
30K18.64 mi3.11 mi22426+1768870+558870+5521709(Top 76%)8621(Top 71%)8621(Top 476%)
20M20.00 mi1.36 mi22398+288872-28872-222104(Top 78%)8957(Top 73%)8957(Top 494%)
21M21.00 mi1.00 mi22332+668850+228850+2221712(Top 76%)8821(Top 72%)8821(Top 487%)
35K21.75 mi0.75 mi22970-6389224-3749224-37428278(Top 100%)12184(Top 100%)12184(Top 672%)
23M23.00 mi1.25 mi22896+749207+179207+1722232(Top 78%)9188(Top 75%)9188(Top 507%)
24M24.00 mi1.00 mi23050-1549318-1119318-11125280(Top 89%)10763(Top 88%)10763(Top 594%)
40K24.85 mi0.85 mi23168-1189399-819399-8125362(Top 89%)10849(Top 89%)10849(Top 598%)
25.2M25.20 mi0.35 mi23273-1059450-519450-5127021(Top 95%)11670(Top 95%)11670(Top 644%)
Finish26.22 mi1.02 mi23479-2069576-1269576-12626656(Top 94%)11453(Top 94%)11453(Top 632%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

21219

Females

8126

F45-49

8126

5K→10K

3.1 - 6.2 mi

Top 76%
×5story building
+79ft-138ft

Overall

21586

Females

8365

F45-49

8365

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

21219

Females

8126

F45-49

8126

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

22995

Females

9145

F45-49

9145

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

22772

Females

9026

F45-49

9026

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

21565

Females

8406

F45-49

8406

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

21709

Females

8621

F45-49

8621

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22104

Females

8957

F45-49

8957

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

21712

Females

8821

F45-49

8821

21M→35K

21.0 - 21.8 mi

Top 100%
×7story building
+17ft-86ft

Overall

28278

Females

12184

F45-49

12184

35K→23M

21.8 - 23.0 mi

Top 78%
×5story building
+23ft-63ft

Overall

22232

Females

9188

F45-49

9188

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

25280

Females

10763

F45-49

10763

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25362

Females

10849

F45-49

10849

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

27021

Females

11670

F45-49

11670

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

26656

Females

11453

F45-49

11453

Passing Analysis

Category:
Athletes Passed
3112
Passed By
1821
Net Change
+1291
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24770
5K → 10K13794+1375#24770#23395
10K → 15K63913+626#23395#22769
15K → 20K156249-93#22769#22862
20K → Half2724+3#22862#22859
Half → 25K28730+257#22859#22602
25K → 30K26892+176#22602#22426
30K → 20M8456+28#22426#22398
20M → 21M10741+66#22398#22332
21M → 35K4642-638#22332#22970
35K → 23M10430+74#22970#22896
23M → 24M25179-154#22896#23050
24M → 40K24142-118#23050#23168
40K → 25.2M1106-105#23168#23273
25.2M → Finish7213-206#23273#23479
TOTALS31121821+1291
📊

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