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BOSTON MARATHON 2025

Helen Dempster

Bib: 21342•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 28%
Gender (Female)
#0 / 12228
Top 11%
Masters (Masters Women)
#0 / 6759
Top 3%
Division (F50-54)
#0 / 1303
Top 2%
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
7:24/mi
22:59
↑ 97↓ 3451.5%
10K· 6.21 mi
7:10/mi
45:16
↑ 79↓ 1380.4%
15K· 9.32 mi
7:16/mi
1:07:52
↑ 67↓ 78
20K· 12.43 mi
7:19/mi
1:30:35
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:35:29
↑ 19↓ 370.5%
25K· 15.53 mi
7:18/mi
1:53:11
↑ 66↓ 880.2%
30K· 18.64 mi
7:28/mi
2:16:22
↑ 181↓ 1480.2%
20M
7:30/mi
2:26:33
↑ 64↓ 500.2%
21M
7:51/mi
2:34:24
↑ 106↓ 241.6%
35K· 21.75 mi
7:22/mi
2:39:55
↑ 17↓ 861.7%
23M
7:32/mi
2:49:21
↑ 23↓ 630.6%
24M
7:23/mi
2:56:44
↓ 821.3%
40K· 24.85 mi
7:22/mi
3:03:02
↓ 200.3%
25.2M
7:58/mi
3:05:47
↑ 13↓ 160.2%
Finish· 26.22 mi
7:09/mi
3:13:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:29
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time1:37:35
Pace7:27 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:0522:597:2422:59
7:24
-
10K
6.21 mi11:37:2245:167:1722:17
7:10
-0:14
15K
9.32 mi11:59:581:07:527:1722:36
7:16
+0:06
20K
12.43 mi12:22:411:30:357:1722:43
7:19
+0:03
Half
13.11 mi12:27:351:35:297:174:54
7:11
-0:08
25K
15.53 mi12:45:171:53:117:1717:42
7:18
+0:07
30K
18.64 mi13:08:282:16:227:1923:11
7:28
+0:10
20M
20.00 mi13:18:392:26:337:2010:11
7:30
+0:02
21M
21.00 mi13:26:302:34:247:217:51
7:51
+0:21
35K
21.75 mi13:32:012:39:557:215:31
7:22
-0:29
23M
23.00 mi13:41:272:49:217:229:26
7:32
+0:10
24M
24.00 mi13:48:502:56:447:227:23
7:23
-0:09
40K
24.85 mi13:55:083:03:027:226:18
7:22
-0:01
25.2M
25.20 mi13:57:533:05:477:222:45
7:58
+0:36
Finish
26.22 mi14:05:103:13:047:227:17
7:09
-0:49

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

7:09 /mi

Average Pace

7:22 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:19

99% of race

Time at Steady Pace

2:45

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:22 /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 mi11:15:0522:597:2422:59
7:24
#11299
10K
6.21 mi11:37:2245:167:1722:17
7:10
#10219
15K
9.32 mi11:59:581:07:527:1722:36
7:16
#10058
20K
12.43 mi12:22:411:30:357:1722:43
7:19
#9774
Half
13.11 mi12:27:351:35:297:174:54
7:11
#9733
25K
15.53 mi12:45:171:53:117:1717:42
7:18
#9453
30K
18.64 mi13:08:282:16:227:1923:11
7:28
#8975
20M
20.00 mi13:18:392:26:337:2010:11
7:30
#8759
21M
21.00 mi13:26:302:34:247:217:51
7:51
#8567
35K
21.75 mi13:32:012:39:557:215:31
7:22
#8504
23M
23.00 mi13:41:272:49:217:229:26
7:32
#8326
24M
24.00 mi13:48:502:56:447:227:23
7:23
#8213
40K
24.85 mi13:55:083:03:027:226:18
7:22
#8098
25.2M
25.20 mi13:57:533:05:477:222:45
7:58
#8036
Finish
26.22 mi14:05:103:13:047:227:17
7:09
#7927
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi11299242224229781(Top 34%)1783(Top 15%)1783(Top 137%)
10K6.21 mi3.10 mi10219+10801914+5081914+5089271(Top 33%)1496(Top 12%)1496(Top 115%)
15K9.32 mi3.11 mi10058+1611866+481866+489781(Top 34%)1783(Top 15%)1783(Top 137%)
20K12.43 mi3.11 mi9774+2841763+1031763+1039142(Top 32%)1584(Top 13%)1584(Top 122%)
Half13.11 mi0.68 mi9733+411747+161747+168985(Top 32%)1486(Top 12%)1486(Top 114%)
25K15.53 mi2.42 mi9453+2801655+921655+928379(Top 29%)1371(Top 11%)1371(Top 105%)
30K18.64 mi3.11 mi8975+4781502+1531502+1537493(Top 26%)1201(Top 10%)1201(Top 92%)
20M20.00 mi1.36 mi8759+2161445+571445+576996(Top 25%)1152(Top 9%)1152(Top 88%)
21M21.00 mi1.00 mi8567+1921394+511394+516526(Top 23%)1117(Top 9%)1117(Top 86%)
35K21.75 mi0.75 mi8504+631393+11393+17753(Top 27%)1576(Top 13%)1576(Top 121%)
23M23.00 mi1.25 mi8326+1781366+271366+276844(Top 24%)1327(Top 11%)1327(Top 102%)
24M24.00 mi1.00 mi8213+1131357+91357+96970(Top 25%)1440(Top 12%)1440(Top 111%)
40K24.85 mi0.85 mi8098+1151346+111346+116055(Top 21%)1163(Top 10%)1163(Top 89%)
25.2M25.20 mi0.35 mi8036+621335+111335+115874(Top 21%)1200(Top 10%)1200(Top 92%)
Finish26.22 mi1.02 mi7927+1091326+91326+96714(Top 24%)1535(Top 13%)1535(Top 118%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9781

Females

1783

F50-54

1783

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

9271

Females

1496

F50-54

1496

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9781

Females

1783

F50-54

1783

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

9142

Females

1584

F50-54

1584

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8985

Females

1486

F50-54

1486

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

8379

Females

1371

F50-54

1371

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7493

Females

1201

F50-54

1201

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

6996

Females

1152

F50-54

1152

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6526

Females

1117

F50-54

1117

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7753

Females

1576

F50-54

1576

35K→23M

21.8 - 23.0 mi

Top 24%
×5story building
+23ft-63ft

Overall

6844

Females

1327

F50-54

1327

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

6970

Females

1440

F50-54

1440

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

6055

Females

1163

F50-54

1163

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5874

Females

1200

F50-54

1200

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2story building
+22ft-21ft

Overall

6714

Females

1535

F50-54

1535

Passing Analysis

Category:
Athletes Passed
3749*
Passed By
377
Net Change
+3372
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11299
5K → 10K110121+1080#11299#10219
10K → 15K24988+161#10219#10058
15K → 20K339*55+284#10058#9774
20K → Half5514+41#9774#9733
Half → 25K31030+280#9733#9453
25K → 30K50022+478#9453#8975
30K → 20M22610+216#8975#8759
20M → 21M20715+192#8759#8567
21M → 35K9027+63#8567#8504
35K → 23M20527+178#8504#8326
23M → 24M13522+113#8326#8213
24M → 40K12914+115#8213#8098
40K → 25.2M664+62#8098#8036
25.2M → Finish13728+109#8036#7927
TOTALS3749*377+3372

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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