Boston Marathon logo
BOSTON MARATHON 2025

Catherine Brown

Bib: 23775•F

DC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 46%
Masters (Masters Women)
#0 / 6759
Top 33%
Division (F50-54)
#0 / 1303
Top 26%
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
7:54/mi
24:34
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
48:54
↑ 79↓ 1380.4%
15K· 9.32 mi
7:46/mi
1:13:02
↑ 67↓ 78
20K· 12.43 mi
8:07/mi
1:38:15
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:43:39
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:03:53
↑ 66↓ 880.2%
30K· 18.64 mi
8:45/mi
2:31:04
↑ 181↓ 1480.2%
20M
8:54/mi
2:43:09
↑ 64↓ 500.2%
21M
9:27/mi
2:52:36
↑ 106↓ 241.6%
35K· 21.75 mi
8:37/mi
2:59:03
↑ 17↓ 861.7%
23M
9:11/mi
3:10:33
↑ 23↓ 630.6%
24M
9:17/mi
3:19:50
↓ 821.3%
40K· 24.85 mi
9:56/mi
3:28:20
↓ 200.3%
25.2M
10:32/mi
3:31:58
↑ 13↓ 160.2%
Finish· 26.22 mi
9:27/mi
3:41:36
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:39
Pace7:54 /mi
2nd Half
Distance13.11 mi
Time1:57:57
Pace9:00 /mi
📊Positive Split: 13.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:3124:347:5424:34
7:54
-
10K
6.21 mi11:49:5148:547:5224:20
7:50
-0:04
15K
9.32 mi12:13:591:13:027:5024:08
7:46
-0:04
20K
12.43 mi12:39:121:38:157:5425:13
8:07
+0:21
Half
13.11 mi12:44:361:43:397:545:24
7:55
-0:12
25K
15.53 mi13:04:502:03:537:5820:14
8:21
+0:26
30K
18.64 mi13:32:012:31:048:0627:11
8:45
+0:24
20M
20.00 mi13:44:062:43:098:0912:05
8:54
+0:09
21M
21.00 mi13:53:332:52:368:139:27
9:27
+0:33
35K
21.75 mi14:00:002:59:038:146:27
8:37
-0:50
23M
23.00 mi14:11:303:10:338:1711:30
9:11
+0:34
24M
24.00 mi14:20:473:19:508:209:17
9:17
+0:06
40K
24.85 mi14:29:173:28:208:238:30
9:56
+0:39
25.2M
25.20 mi14:32:553:31:588:253:38
10:32
+0:36
Finish
26.22 mi14:42:333:41:368:279:38
9:27
-1:05

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

7:46 /mi

Average Pace

8:27 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:39

47% of race

Time at Steady Pace

1:05:57

30% of race

Time at Slower Pace

52:00

23% of race

Average Pace: 8:27 /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 mi11:25:3124:347:5424:34
7:54
#15785
10K
6.21 mi11:49:5148:547:5224:20
7:50
#15417
15K
9.32 mi12:13:591:13:027:5024:08
7:46
#14952
20K
12.43 mi12:39:121:38:157:5425:13
8:07
#15152
Half
13.11 mi12:44:361:43:397:545:24
7:55
#15156
25K
15.53 mi13:04:502:03:537:5820:14
8:21
#15366
30K
18.64 mi13:32:012:31:048:0627:11
8:45
#15536
20M
20.00 mi13:44:062:43:098:0912:05
8:54
#15535
21M
21.00 mi13:53:332:52:368:139:27
9:27
#15528
35K
21.75 mi14:00:002:59:038:146:27
8:37
#15554
23M
23.00 mi14:11:303:10:338:1711:30
9:11
#15619
24M
24.00 mi14:20:473:19:508:209:17
9:17
#15738
40K
24.85 mi14:29:173:28:208:238:30
9:56
#15959
25.2M
25.20 mi14:32:553:31:588:253:38
10:32
#16018
Finish
26.22 mi14:42:333:41:368:279:38
9:27
#16273
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi157855014501414120(Top 50%)4092(Top 33%)4092(Top 314%)
10K6.21 mi3.10 mi15417+3684786+2284786+22815134(Top 53%)4622(Top 38%)4622(Top 355%)
15K9.32 mi3.11 mi14952+4654529+2574529+25714120(Top 50%)4092(Top 33%)4092(Top 314%)
20K12.43 mi3.11 mi15152-2004669-1404669-14015771(Top 56%)5080(Top 42%)5080(Top 390%)
Half13.11 mi0.68 mi15156-44673-44673-415304(Top 54%)4801(Top 39%)4801(Top 368%)
25K15.53 mi2.42 mi15366-2104813-1404813-14016220(Top 57%)5435(Top 44%)5435(Top 417%)
30K18.64 mi3.11 mi15536-1704967-1544967-15416298(Top 57%)5631(Top 46%)5631(Top 432%)
20M20.00 mi1.36 mi15535+14992-254992-2516198(Top 57%)5717(Top 47%)5717(Top 439%)
21M21.00 mi1.00 mi15528+75031-395031-3915870(Top 56%)5639(Top 46%)5639(Top 433%)
35K21.75 mi0.75 mi15554-265068-375068-3716212(Top 57%)5897(Top 48%)5897(Top 453%)
23M23.00 mi1.25 mi15619-655141-735141-7317273(Top 61%)6589(Top 54%)6589(Top 506%)
24M24.00 mi1.00 mi15738-1195231-905231-9018748(Top 66%)7405(Top 61%)7405(Top 568%)
40K24.85 mi0.85 mi15959-2215380-1495380-14920263(Top 71%)8283(Top 68%)8283(Top 636%)
25.2M25.20 mi0.35 mi16018-595430-505430-5019148(Top 67%)7703(Top 63%)7703(Top 591%)
Finish26.22 mi1.02 mi16273-2555585-1555585-15521019(Top 74%)8661(Top 71%)8661(Top 665%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14120

Females

4092

F50-54

4092

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

15134

Females

4622

F50-54

4622

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14120

Females

4092

F50-54

4092

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

15771

Females

5080

F50-54

5080

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

15304

Females

4801

F50-54

4801

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16220

Females

5435

F50-54

5435

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16298

Females

5631

F50-54

5631

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16198

Females

5717

F50-54

5717

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

15870

Females

5639

F50-54

5639

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16212

Females

5897

F50-54

5897

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

17273

Females

6589

F50-54

6589

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18748

Females

7405

F50-54

7405

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20263

Females

8283

F50-54

8283

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19148

Females

7703

F50-54

7703

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2story building
+22ft-21ft

Overall

21019

Females

8661

F50-54

8661

Passing Analysis

Category:
Athletes Passed
1999
Passed By
2487
Net Change
-488
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15785
5K → 10K531163+368#15785#15417
10K → 15K50237+465#15417#14952
15K → 20K157357-200#14952#15152
20K → Half3842-4#15152#15156
Half → 25K107317-210#15156#15366
25K → 30K189359-170#15366#15536
30K → 20M116115+1#15536#15535
20M → 21M123116+7#15535#15528
21M → 35K4975-26#15528#15554
35K → 23M88153-65#15554#15619
23M → 24M36155-119#15619#15738
24M → 40K29250-221#15738#15959
40K → 25.2M1574-59#15959#16018
25.2M → Finish19274-255#16018#16273
TOTALS19992487-488
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing