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BOSTON MARATHON 2025

Jennifer Dembeck

Bib: 8946•F

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 13%
Gender (Female)
#0 / 12228
Top 2%
Masters (Masters Women)
#0 / 6759
Top 0.4%
Division (F55-59)
#0 / 994
Top 0.1%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #5371
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:16
Rank: #4845 (+526)
5K → 10K
20:29 | 6:36/mi
15K· 9.32 mi
1:01:50
Rank: #4664 (+181)
10K → 15K
20:34 | 6:37/mi
20K· 12.43 mi
1:22:39
Rank: #4561 (+103)
15K → 20K
20:49 | 6:42/mi
Half· 13.11 mi
1:27:10
Rank: #4561
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:43:19
Rank: #4386 (+175)
Half → 25K
16:09 | 6:40/mi
30K· 18.64 mi
2:04:11
Rank: #4019 (+367)
25K → 30K
20:52 | 6:43/mi
20M
2:13:33
Rank: #3958 (+61)
30K → 20M
9:22 | 6:54/mi
21M
2:20:54
Rank: #3920 (+38)
20M → 21M
7:21 | 7:21/mi
35K· 21.75 mi
2:25:53
Rank: #3874 (+46)
21M → 35K
4:59 | 6:40/mi
23M
2:34:39
Rank: #3839 (+35)
35K → 23M
8:46 | 7:00/mi
24M
2:41:22
Rank: #3775 (+64)
23M → 24M
6:43 | 6:43/mi
40K· 24.85 mi
2:47:18
Rank: #3745 (+30)
24M → 40K
5:56 | 6:56/mi
25.2M
2:49:55
Rank: #3735 (+10)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:56:57
Rank: #3732 (+3)
25.2M → Finish
7:02 | 6:54/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:10
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:29:47
Pace6:51 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:0720:476:4120:47
6:41
-
10K
6.21 mi11:06:3641:166:3820:29
6:36
-0:05
15K
9.32 mi11:27:101:01:506:3820:34
6:37
+0:01
20K
12.43 mi11:47:591:22:396:3920:49
6:42
+0:05
Half
13.11 mi11:52:301:27:106:394:31
6:37
-0:05
25K
15.53 mi12:08:391:43:196:3916:09
6:40
+0:03
30K
18.64 mi12:29:312:04:116:4020:52
6:43
+0:03
20M
20.00 mi12:38:532:13:336:419:22
6:54
+0:11
21M
21.00 mi12:46:142:20:546:437:21
7:21
+0:27
35K
21.75 mi12:51:132:25:536:424:59
6:40
-0:41
23M
23.00 mi12:59:592:34:396:438:46
7:00
+0:20
24M
24.00 mi13:06:422:41:226:436:43
6:43
-0:17
40K
24.85 mi13:12:382:47:186:445:56
6:56
+0:13
25.2M
25.20 mi13:15:152:49:556:452:37
7:35
+0:39
Finish
26.22 mi13:22:172:56:576:457:02
6:54
-0:41

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

6:36 /mi

Average Pace

6:45 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:59

94% of race

Time at Steady Pace

9:58

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:45 /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 mi10:46:0720:476:4120:47
6:41
#5371
10K
6.21 mi11:06:3641:166:3820:29
6:36
#4845
15K
9.32 mi11:27:101:01:506:3820:34
6:37
#4664
20K
12.43 mi11:47:591:22:396:3920:49
6:42
#4561
Half
13.11 mi11:52:301:27:106:394:31
6:37
#4561
25K
15.53 mi12:08:391:43:196:3916:09
6:40
#4386
30K
18.64 mi12:29:312:04:116:4020:52
6:43
#4019
20M
20.00 mi12:38:532:13:336:419:22
6:54
#3958
21M
21.00 mi12:46:142:20:546:437:21
7:21
#3920
35K
21.75 mi12:51:132:25:536:424:59
6:40
#3874
23M
23.00 mi12:59:592:34:396:438:46
7:00
#3839
24M
24.00 mi13:06:422:41:226:436:43
6:43
#3775
40K
24.85 mi13:12:382:47:186:445:56
6:56
#3745
25.2M
25.20 mi13:15:152:49:556:452:37
7:35
#3735
Finish
26.22 mi13:22:172:56:576:457:02
6:54
#3732
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi53713693694414(Top 16%)263(Top 2%)263(Top 26%)
10K6.21 mi3.10 mi4845+526307+62307+624438(Top 16%)268(Top 2%)268(Top 27%)
15K9.32 mi3.11 mi4664+181290+17290+174414(Top 16%)263(Top 2%)263(Top 26%)
20K12.43 mi3.11 mi4561+103282+8282+84453(Top 16%)288(Top 2%)288(Top 29%)
Half13.11 mi0.68 mi4561285-3285-34677(Top 16%)306(Top 3%)306(Top 31%)
25K15.53 mi2.42 mi4386+175266+19266+193885(Top 14%)240(Top 2%)240(Top 24%)
30K18.64 mi3.11 mi4019+367235+31235+312975(Top 10%)167(Top 1%)167(Top 17%)
20M20.00 mi1.36 mi3958+61233+2233+23508(Top 12%)260(Top 2%)260(Top 26%)
21M21.00 mi1.00 mi3920+38235-2235-23894(Top 14%)343(Top 3%)343(Top 35%)
35K21.75 mi0.75 mi3874+46233+2233+23330(Top 12%)277(Top 2%)277(Top 28%)
23M23.00 mi1.25 mi3839+35241-8241-83790(Top 13%)368(Top 3%)368(Top 37%)
24M24.00 mi1.00 mi3775+64240+1240+13088(Top 11%)279(Top 2%)279(Top 28%)
40K24.85 mi0.85 mi3745+30242-2242-23600(Top 13%)395(Top 3%)395(Top 40%)
25.2M25.20 mi0.35 mi3735+10248-6248-63880(Top 14%)514(Top 4%)514(Top 52%)
Finish26.22 mi1.02 mi3732+3254-6254-65124(Top 18%)897(Top 7%)897(Top 90%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4414

Females

263

F55-59

263

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4438

Females

268

F55-59

268

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4414

Females

263

F55-59

263

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4453

Females

288

F55-59

288

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4677

Females

306

F55-59

306

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

3885

Females

240

F55-59

240

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2975

Females

167

F55-59

167

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3508

Females

260

F55-59

260

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3894

Females

343

F55-59

343

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3330

Females

277

F55-59

277

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3790

Females

368

F55-59

368

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3088

Females

279

F55-59

279

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3600

Females

395

F55-59

395

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3880

Females

514

F55-59

514

25.2M→Finish

25.2 - 26.2 mi

Top 18%
×2stories
+22ft-21ft

Overall

5124

Females

897

F55-59

897

Passing Analysis

Category:
Athletes Passed
2068
Passed By
429
Net Change
+1639
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5371
5K → 10K55731+526#5371#4845
10K → 15K22342+181#4845#4664
15K → 20K16764+103#4664#4561
20K → Half17170#4561#4561
Half → 25K19722+175#4561#4386
25K → 30K37710+367#4386#4019
30K → 20M8524+61#4019#3958
20M → 21M7840+38#3958#3920
21M → 35K5711+46#3920#3874
35K → 23M7944+35#3874#3839
23M → 24M8420+64#3839#3775
24M → 40K5727+30#3775#3745
40K → 25.2M2818+10#3745#3735
25.2M → Finish6259+3#3735#3732
TOTALS2068429+1639
📊

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