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BOSTON MARATHON 2025

Kathryn Glenn Brown

Bib: 10173•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Female)
#0 / 12228
Top 2%
Division (F18-39)
#0 / 5469
Top 4%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #5370
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:34
Rank: #5271 (+99)
5K → 10K
20:47 | 6:41/mi
15K· 9.32 mi
1:02:24
Rank: #5220 (+51)
10K → 15K
20:50 | 6:42/mi
20K· 12.43 mi
1:23:12
Rank: #4951 (+269)
15K → 20K
20:48 | 6:42/mi
Half· 13.11 mi
1:27:43
Rank: #4927 (+24)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:44:03
Rank: #4779 (+148)
Half → 25K
16:20 | 6:44/mi
30K· 18.64 mi
2:05:20
Rank: #4521 (+258)
25K → 30K
21:17 | 6:51/mi
20M
2:14:42
Rank: #4385 (+136)
30K → 20M
9:22 | 6:54/mi
21M
2:21:59
Rank: #4277 (+108)
20M → 21M
7:17 | 7:17/mi
35K· 21.75 mi
2:26:54
Rank: #4201 (+76)
21M → 35K
4:55 | 6:34/mi
23M
2:35:21
Rank: #4052 (+149)
35K → 23M
8:27 | 6:45/mi
24M
2:41:53
Rank: #3928 (+124)
23M → 24M
6:32 | 6:32/mi
40K· 24.85 mi
2:47:34
Rank: #3817 (+111)
24M → 40K
5:41 | 6:39/mi
25.2M
2:50:04
Rank: #3770 (+47)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
2:56:35
Rank: #3636 (+134)
25.2M → Finish
6:31 | 6:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:43
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:28:52
Pace6:47 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:0220:476:4120:47
6:41
-
10K
6.21 mi11:07:4941:346:4120:47
6:41
0:00
15K
9.32 mi11:28:391:02:246:4220:50
6:42
+0:01
20K
12.43 mi11:49:271:23:126:4220:48
6:42
0:00
Half
13.11 mi11:53:581:27:436:414:31
6:37
-0:05
25K
15.53 mi12:10:181:44:036:4216:20
6:44
+0:07
30K
18.64 mi12:31:352:05:206:4321:17
6:51
+0:07
20M
20.00 mi12:40:572:14:426:449:22
6:54
+0:03
21M
21.00 mi12:48:142:21:596:467:17
7:17
+0:23
35K
21.75 mi12:53:092:26:546:454:55
6:34
-0:43
23M
23.00 mi13:01:362:35:216:458:27
6:45
+0:11
24M
24.00 mi13:08:082:41:536:456:32
6:32
-0:13
40K
24.85 mi13:13:492:47:346:455:41
6:39
+0:07
25.2M
25.20 mi13:16:192:50:046:452:30
7:15
+0:36
Finish
26.22 mi13:22:502:56:356:446:31
6:24
-0:51

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

6:24 /mi

Average Pace

6:44 /mi

Slowest Pace

7:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:48

94% of race

Time at Steady Pace

9:47

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:44 /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 mi10:47:0220:476:4120:47
6:41
#5370
10K
6.21 mi11:07:4941:346:4120:47
6:41
#5271
15K
9.32 mi11:28:391:02:246:4220:50
6:42
#5220
20K
12.43 mi11:49:271:23:126:4220:48
6:42
#4951
Half
13.11 mi11:53:581:27:436:414:31
6:37
#4927
25K
15.53 mi12:10:181:44:036:4216:20
6:44
#4779
30K
18.64 mi12:31:352:05:206:4321:17
6:51
#4521
20M
20.00 mi12:40:572:14:426:449:22
6:54
#4385
21M
21.00 mi12:48:142:21:596:467:17
7:17
#4277
35K
21.75 mi12:53:092:26:546:454:55
6:34
#4201
23M
23.00 mi13:01:362:35:216:458:27
6:45
#4052
24M
24.00 mi13:08:082:41:536:456:32
6:32
#3928
40K
24.85 mi13:13:492:47:346:455:41
6:39
#3817
25.2M
25.20 mi13:16:192:50:046:452:30
7:15
#3770
Finish
26.22 mi13:22:502:56:356:446:31
6:24
#3636
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi53703683685145(Top 18%)367(Top 3%)367(Top 7%)
10K6.21 mi3.10 mi5271+99365+3365+35274(Top 19%)371(Top 3%)371(Top 7%)
15K9.32 mi3.11 mi5220+51360+5360+55145(Top 18%)367(Top 3%)367(Top 7%)
20K12.43 mi3.11 mi4951+269328+32328+324403(Top 16%)279(Top 2%)279(Top 5%)
Half13.11 mi0.68 mi4927+24326+2326+24676(Top 16%)305(Top 2%)305(Top 6%)
25K15.53 mi2.42 mi4779+148324+2324+24401(Top 15%)311(Top 3%)311(Top 6%)
30K18.64 mi3.11 mi4521+258295+29295+293762(Top 13%)270(Top 2%)270(Top 5%)
20M20.00 mi1.36 mi4385+136286+9286+93506(Top 12%)258(Top 2%)258(Top 5%)
21M21.00 mi1.00 mi4277+108284+2284+23575(Top 13%)291(Top 2%)291(Top 5%)
35K21.75 mi0.75 mi4201+76278+6278+62870(Top 10%)215(Top 2%)215(Top 4%)
23M23.00 mi1.25 mi4052+149273+5273+52490(Top 9%)176(Top 1%)176(Top 3%)
24M24.00 mi1.00 mi3928+124266+7266+72219(Top 8%)157(Top 1%)157(Top 3%)
40K24.85 mi0.85 mi3817+111257+9257+92190(Top 8%)172(Top 1%)172(Top 3%)
25.2M25.20 mi0.35 mi3770+47251+6251+62401(Top 8%)244(Top 2%)244(Top 4%)
Finish26.22 mi1.02 mi3636+134242+9242+92324(Top 8%)194(Top 2%)194(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5145

Females

367

F18-39

367

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5274

Females

371

F18-39

371

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5145

Females

367

F18-39

367

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4403

Females

279

F18-39

279

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4676

Females

305

F18-39

305

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4401

Females

311

F18-39

311

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3762

Females

270

F18-39

270

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3506

Females

258

F18-39

258

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3575

Females

291

F18-39

291

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2870

Females

215

F18-39

215

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2490

Females

176

F18-39

176

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2219

Females

157

F18-39

157

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2190

Females

172

F18-39

172

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2401

Females

244

F18-39

244

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2324

Females

194

F18-39

194

Passing Analysis

Category:
Athletes Passed
2134
Passed By
400
Net Change
+1734
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5370
5K → 10K228129+99#5370#5271
10K → 15K158107+51#5271#5220
15K → 20K28819+269#5220#4951
20K → Half3410+24#4951#4927
Half → 25K17628+148#4927#4779
25K → 30K29537+258#4779#4521
30K → 20M14812+136#4521#4385
20M → 21M12820+108#4385#4277
21M → 35K848+76#4277#4201
35K → 23M1589+149#4201#4052
23M → 24M1306+124#4052#3928
24M → 40K1143+111#3928#3817
40K → 25.2M514+47#3817#3770
25.2M → Finish1428+134#3770#3636
TOTALS2134400+1734
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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