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BOSTON MARATHON 2025

Kathryn Dierks

Bib: 19659•F

IA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 48%
Gender (Female)
#0 / 12228
Top 33%
Masters (Masters Women)
#0 / 6759
Top 18%
Division (F40-44)
#0 / 1718
Top 38%
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
7:56/mi
24:39
↑ 97↓ 3451.5%
10K· 6.21 mi
7:51/mi
49:02
↑ 79↓ 1380.4%
15K· 9.32 mi
7:52/mi
1:13:27
↑ 67↓ 78
20K· 12.43 mi
7:50/mi
1:37:47
↑ 106↓ 860.1%
Half· 13.11 mi
7:45/mi
1:43:04
↑ 19↓ 370.5%
25K· 15.53 mi
7:56/mi
2:02:19
↑ 66↓ 880.2%
30K· 18.64 mi
8:11/mi
2:27:45
↑ 181↓ 1480.2%
20M
8:20/mi
2:39:04
↑ 64↓ 500.2%
21M
8:55/mi
2:47:59
↑ 106↓ 241.6%
35K· 21.75 mi
7:49/mi
2:53:50
↑ 17↓ 861.7%
23M
8:19/mi
3:04:15
↑ 23↓ 630.6%
24M
8:14/mi
3:12:29
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:19:50
↓ 200.3%
25.2M
9:11/mi
3:23:00
↑ 13↓ 160.2%
Finish· 26.22 mi
8:02/mi
3:31:11
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:04
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:48:07
Pace8:15 /mi
📊Positive Split: 4.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0824:397:5624:39
7:56
-
10K
6.21 mi11:40:3149:027:5324:23
7:51
-0:05
15K
9.32 mi12:04:561:13:277:5324:25
7:52
+0:01
20K
12.43 mi12:29:161:37:477:5224:20
7:50
-0:02
Half
13.11 mi12:34:331:43:047:525:17
7:45
-0:05
25K
15.53 mi12:53:482:02:197:5219:15
7:56
+0:11
30K
18.64 mi13:19:142:27:457:5625:26
8:11
+0:15
20M
20.00 mi13:30:332:39:047:5711:19
8:20
+0:09
21M
21.00 mi13:39:282:47:598:008:55
8:55
+0:35
35K
21.75 mi13:45:192:53:508:005:51
7:49
-1:06
23M
23.00 mi13:55:443:04:158:0110:25
8:19
+0:30
24M
24.00 mi14:03:583:12:298:018:14
8:14
-0:05
40K
24.85 mi14:11:193:19:508:027:21
8:36
+0:22
25.2M
25.20 mi14:14:293:23:008:033:10
9:11
+0:35
Finish
26.22 mi14:22:403:31:118:048:11
8:02
-1:09

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

7:45 /mi

Average Pace

8:04 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:11:45

91% of race

Time at Steady Pace

16:16

8% of race

Time at Slower Pace

3:10

1% of race

Average Pace: 8:03 /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 mi11:16:0824:397:5624:39
7:56
#16056
10K
6.21 mi11:40:3149:027:5324:23
7:51
#15600
15K
9.32 mi12:04:561:13:277:5324:25
7:52
#15338
20K
12.43 mi12:29:161:37:477:5224:20
7:50
#14820
Half
13.11 mi12:34:331:43:047:525:17
7:45
#14757
25K
15.53 mi12:53:482:02:197:5219:15
7:56
#14511
30K
18.64 mi13:19:142:27:457:5625:26
8:11
#14088
20M
20.00 mi13:30:332:39:047:5711:19
8:20
#13938
21M
21.00 mi13:39:282:47:598:008:55
8:55
#13853
35K
21.75 mi13:45:192:53:508:005:51
7:49
#13726
23M
23.00 mi13:55:443:04:158:0110:25
8:19
#13601
24M
24.00 mi14:03:583:12:298:018:14
8:14
#13550
40K
24.85 mi14:11:193:19:508:027:21
8:36
#13559
25.2M
25.20 mi14:14:293:23:008:033:10
9:11
#13541
Finish
26.22 mi14:22:403:31:118:048:11
8:02
#13531
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi160565177517714899(Top 52%)4526(Top 37%)4526(Top 263%)
10K6.21 mi3.10 mi15600+4564895+2824895+28215253(Top 54%)4690(Top 38%)4690(Top 273%)
15K9.32 mi3.11 mi15338+2624755+1404755+14014899(Top 52%)4526(Top 37%)4526(Top 263%)
20K12.43 mi3.11 mi14820+5184482+2734482+27313543(Top 48%)3843(Top 31%)3843(Top 224%)
Half13.11 mi0.68 mi14757+634446+364446+3613834(Top 49%)3973(Top 32%)3973(Top 231%)
25K15.53 mi2.42 mi14511+2464343+1034343+10313438(Top 47%)3905(Top 32%)3905(Top 227%)
30K18.64 mi3.11 mi14088+4234159+1844159+18412739(Top 45%)3687(Top 30%)3687(Top 215%)
20M20.00 mi1.36 mi13938+1504108+514108+5112694(Top 45%)3804(Top 31%)3804(Top 221%)
21M21.00 mi1.00 mi13853+854087+214087+2113043(Top 46%)4143(Top 34%)4143(Top 241%)
35K21.75 mi0.75 mi13726+1274036+514036+5111040(Top 39%)3138(Top 26%)3138(Top 183%)
23M23.00 mi1.25 mi13601+1254012+244012+2412179(Top 43%)3836(Top 31%)3836(Top 223%)
24M24.00 mi1.00 mi13550+514004+84004+812828(Top 45%)4228(Top 35%)4228(Top 246%)
40K24.85 mi0.85 mi13559-94034-304034-3014052(Top 49%)4989(Top 41%)4989(Top 290%)
25.2M25.20 mi0.35 mi13541+184039-54039-512860(Top 45%)4418(Top 36%)4418(Top 257%)
Finish26.22 mi1.02 mi13531+104057-184057-1813098(Top 46%)4486(Top 37%)4486(Top 261%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

14899

Females

4526

F40-44

4526

5K→10K

3.1 - 6.2 mi

Top 54%
×5story building
+79ft-138ft

Overall

15253

Females

4690

F40-44

4690

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

14899

Females

4526

F40-44

4526

15K→20K

9.3 - 12.4 mi

Top 48%
×5story building
+106ft-86ft

Overall

13543

Females

3843

F40-44

3843

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

13834

Females

3973

F40-44

3973

Half→25K

13.1 - 15.5 mi

Top 47%
×4story building
+66ft-88ft

Overall

13438

Females

3905

F40-44

3905

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

12739

Females

3687

F40-44

3687

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12694

Females

3804

F40-44

3804

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13043

Females

4143

F40-44

4143

21M→35K

21.0 - 21.8 mi

Top 39%
×7story building
+17ft-86ft

Overall

11040

Females

3138

F40-44

3138

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

12179

Females

3836

F40-44

3836

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12828

Females

4228

F40-44

4228

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

14052

Females

4989

F40-44

4989

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12860

Females

4418

F40-44

4418

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

13098

Females

4486

F40-44

4486

Passing Analysis

Category:
Athletes Passed
3254
Passed By
729
Net Change
+2525
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16056
5K → 10K592136+456#16056#15600
10K → 15K34179+262#15600#15338
15K → 20K53113+518#15338#14820
20K → Half718+63#14820#14757
Half → 25K29549+246#14757#14511
25K → 30K47956+423#14511#14088
30K → 20M19343+150#14088#13938
20M → 21M13954+85#13938#13853
21M → 35K1347+127#13853#13726
35K → 23M17146+125#13726#13601
23M → 24M10453+51#13601#13550
24M → 40K7786-9#13550#13559
40K → 25.2M5133+18#13559#13541
25.2M → Finish7666+10#13541#13531
TOTALS3254729+2525
📊

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