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BOSTON MARATHON 2025

Carmen Bost

Bib: 21043•F

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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

Start
0:00:00
Race begins
5K· 3.11 mi
27:18
Rank: #21466
Start → 5K
27:18 | 8:47/mi
10K· 6.21 mi
54:38
Rank: #21417 (+49)
5K → 10K
27:20 | 8:48/mi
15K· 9.32 mi
1:22:46
Rank: #21720 (-303)
10K → 15K
28:08 | 9:03/mi
20K· 12.43 mi
1:51:17
Rank: #21731 (-11)
15K → 20K
28:31 | 9:11/mi
Half· 13.11 mi
1:57:12
Rank: #21645 (+86)
20K → Half
5:55 | 8:40/mi
25K· 15.53 mi
2:20:27
Rank: #21741 (-96)
Half → 25K
23:15 | 9:35/mi
30K· 18.64 mi
2:53:38
Rank: #22208 (-467)
25K → 30K
33:11 | 10:41/mi
20M
3:08:08
Rank: #22277 (-69)
30K → 20M
14:30 | 10:40/mi
21M
3:21:28
Rank: #22547 (-270)
20M → 21M
13:20 | 13:20/mi
35K· 21.75 mi
3:28:59
Rank: #22506 (+41)
21M → 35K
7:31 | 10:03/mi
23M
3:45:49
Rank: #22949 (-443)
35K → 23M
16:50 | 13:27/mi
24M
3:56:01
Rank: #22898 (+51)
23M → 24M
10:12 | 10:12/mi
40K· 24.85 mi
4:09:02
Rank: #23302 (-404)
24M → 40K
13:01 | 15:13/mi
25.2M
4:13:02
Rank: #23291 (+11)
40K → 25.2M
4:00 | 11:36/mi
Finish· 26.22 mi
4:23:22
Rank: #23309 (-18)
25.2M → Finish
10:20 | 10:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:12
Pace8:56 /mi
2nd Half
Distance13.11 mi
Time2:26:10
Pace11:09 /mi
📊Positive Split: 24.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:5327:188:4727:18
8:47
-
10K
6.21 mi11:47:1354:388:4827:20
8:48
+0:01
15K
9.32 mi12:15:211:22:468:5328:08
9:03
+0:15
20K
12.43 mi12:43:521:51:178:5728:31
9:11
+0:08
Half
13.11 mi12:49:471:57:128:565:55
8:40
-0:31
25K
15.53 mi13:13:022:20:279:0223:15
9:35
+0:55
30K
18.64 mi13:46:132:53:389:1933:11
10:41
+1:06
20M
20.00 mi14:00:433:08:089:2414:30
10:40
-0:01
21M
21.00 mi14:14:033:21:289:3613:20
13:20
+2:40
35K
21.75 mi14:21:343:28:599:377:31
10:03
-3:17
23M
23.00 mi14:38:243:45:499:4916:50
13:27
+3:24
24M
24.00 mi14:48:363:56:019:5010:12
10:12
-3:15
40K
24.85 mi15:01:374:09:0210:0113:01
15:13
+5:01
25.2M
25.20 mi15:05:374:13:0210:024:00
11:36
-3:37
Finish
26.22 mi15:15:574:23:2210:0310:20
10:08
-1:28

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

8:40 /mi

Average Pace

10:03 /mi

Slowest Pace

15:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:41

34% of race

Time at Steady Pace

2:07:30

48% of race

Time at Slower Pace

47:11

18% of race

Average Pace: 10:03 /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 mi11:19:5327:188:4727:18
8:47
#21466
10K
6.21 mi11:47:1354:388:4827:20
8:48
#21417
15K
9.32 mi12:15:211:22:468:5328:08
9:03
#21720
20K
12.43 mi12:43:521:51:178:5728:31
9:11
#21731
Half
13.11 mi12:49:471:57:128:565:55
8:40
#21645
25K
15.53 mi13:13:022:20:279:0223:15
9:35
#21741
30K
18.64 mi13:46:132:53:389:1933:11
10:41
#22208
20M
20.00 mi14:00:433:08:089:2414:30
10:40
#22277
21M
21.00 mi14:14:033:21:289:3613:20
13:20
#22547
35K
21.75 mi14:21:343:28:599:377:31
10:03
#22506
23M
23.00 mi14:38:243:45:499:4916:50
13:27
#22949
24M
24.00 mi14:48:363:56:019:5010:12
10:12
#22898
40K
24.85 mi15:01:374:09:0210:0113:01
15:13
#23302
25.2M
25.20 mi15:05:374:13:0210:024:00
11:36
#23291
Finish
26.22 mi15:15:574:23:2210:0310:20
10:08
#23309
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi214668348834822286(Top 78%)8716(Top 71%)8716(Top 481%)
10K6.21 mi3.10 mi21417+498283+658283+6521402(Top 75%)8255(Top 68%)8255(Top 455%)
15K9.32 mi3.11 mi21720-3038448-1658448-16522286(Top 78%)8716(Top 71%)8716(Top 481%)
20K12.43 mi3.11 mi21731-118455-78455-721816(Top 77%)8490(Top 69%)8490(Top 468%)
Half13.11 mi0.68 mi21645+868404+518404+5120275(Top 71%)7648(Top 63%)7648(Top 422%)
25K15.53 mi2.42 mi21741-968468-648468-6422166(Top 78%)8745(Top 72%)8745(Top 482%)
30K18.64 mi3.11 mi22208-4678737-2698737-26923353(Top 82%)9528(Top 78%)9528(Top 526%)
20M20.00 mi1.36 mi22277-698805-688805-6822890(Top 81%)9361(Top 77%)9361(Top 516%)
21M21.00 mi1.00 mi22547-2708971-1668971-16625497(Top 90%)10805(Top 88%)10805(Top 596%)
35K21.75 mi0.75 mi22506+418969+28969+222063(Top 78%)9071(Top 74%)9071(Top 500%)
23M23.00 mi1.25 mi22949-4439236-2679236-26726837(Top 94%)11517(Top 94%)11517(Top 635%)
24M24.00 mi1.00 mi22898+519234+29234+221958(Top 77%)9114(Top 75%)9114(Top 503%)
40K24.85 mi0.85 mi23302-4049460-2269460-22627863(Top 98%)12036(Top 98%)12036(Top 664%)
25.2M25.20 mi0.35 mi23291+119461-19461-122350(Top 79%)9333(Top 76%)9333(Top 515%)
Finish26.22 mi1.02 mi23309-189479-189479-1823368(Top 82%)9854(Top 81%)9854(Top 544%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21stories
+97ft-345ft

Overall

22286

Females

8716

F45-49

8716

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

21402

Females

8255

F45-49

8255

10K→15K

6.2 - 9.3 mi

Top 78%
×3stories
+67ft-78ft

Overall

22286

Females

8716

F45-49

8716

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21816

Females

8490

F45-49

8490

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20275

Females

7648

F45-49

7648

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

22166

Females

8745

F45-49

8745

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23353

Females

9528

F45-49

9528

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

22890

Females

9361

F45-49

9361

20M→21M

20.0 - 21.0 mi

Top 90%
×8stories
+106ft-24ft

Overall

25497

Females

10805

F45-49

10805

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

22063

Females

9071

F45-49

9071

35K→23M

21.8 - 23.0 mi

Top 94%
×5stories
+23ft-63ft

Overall

26837

Females

11517

F45-49

11517

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

21958

Females

9114

F45-49

9114

24M→40K

24.0 - 24.9 mi

Top 98%
×1story
+6ft-20ft

Overall

27863

Females

12036

F45-49

12036

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22350

Females

9333

F45-49

9333

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2stories
+22ft-21ft

Overall

23368

Females

9854

F45-49

9854

Passing Analysis

Category:
Athletes Passed
1199
Passed By
3042
Net Change
-1843
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21466
5K → 10K309260+49#21466#21417
10K → 15K117420-303#21417#21720
15K → 20K187198-11#21720#21731
20K → Half893+86#21731#21645
Half → 25K118214-96#21645#21741
25K → 30K71538-467#21741#22208
30K → 20M60129-69#22208#22277
20M → 21M23293-270#22277#22547
21M → 35K6726+41#22547#22506
35K → 23M13456-443#22506#22949
23M → 24M8332+51#22949#22898
24M → 40K6410-404#22898#23302
40K → 25.2M198+11#23302#23291
25.2M → Finish3755-18#23291#23309
TOTALS11993042-1843
📊

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