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BOSTON MARATHON 2025

Denise Dacosta

ON

Bib: 17920 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 35%
Gender (Female)
#0 / 12228
Top 18%
Masters (Masters Women)
#0 / 6759
Top 7%
Division (F40-44)
#0 / 1718
Top 16%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:39/mi
23:45
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:43/mi
47:44
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:45/mi
1:11:50
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:38/mi
1:35:34
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:36/mi
1:40:45
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:42/mi
1:59:24
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:49/mi
2:23:40
↑ 181↓ 1480.2%
138 ft elev
20M
7:44/mi
2:34:10
↑ 64↓ 500.2%
148 ft elev
21M
7:57/mi
2:42:07
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:33/mi
2:47:46
↑ 17↓ 861.7%
156 ft elev
23M
7:31/mi
2:57:11
↑ 23↓ 630.6%
116 ft elev
24M
7:07/mi
3:04:18
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:06/mi
3:10:22
↓ 200.3%
20 ft elev
25.2M
7:29/mi
3:12:57
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:39/mi
3:19:44
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:40:45
Pace7:41 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:59
Pace7:33 /mi
📊Negative Split: 1.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:2123:457:3923:45
7:39
-
10K
6.21 mi11:38:2047:447:4123:59
7:43
+0:04
15K
9.32 mi12:02:261:11:507:4224:06
7:45
+0:02
20K
12.43 mi12:26:101:35:347:4123:44
7:38
-0:07
Half
13.11 mi12:31:211:40:457:415:11
7:36
-0:02
25K
15.53 mi12:50:001:59:247:4118:39
7:42
+0:06
30K
18.64 mi13:14:162:23:407:4224:16
7:49
+0:07
20M
20.00 mi13:24:462:34:107:4210:30
7:44
-0:05
21M
21.00 mi13:32:432:42:077:437:57
7:57
+0:13
35K
21.75 mi13:38:222:47:467:435:39
7:33
-0:24
23M
23.00 mi13:47:472:57:117:429:25
7:31
-0:02
24M
24.00 mi13:54:543:04:187:417:07
7:07
-0:24
40K
24.85 mi14:00:583:10:227:406:04
7:06
-0:01
25.2M
25.20 mi14:03:333:12:577:392:35
7:29
+0:23
Finish
26.22 mi14:10:203:19:447:376:47
6:39
-0:50

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

6:39 /mi

Average Pace

7:37 /mi

Slowest Pace

7:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

19:58

10% of race

Time at Steady Pace

2:51:49

86% of race

Time at Slower Pace

7:57

4% of race

Average Pace: 7:37 /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 mi11:14:2123:457:3923:45
7:39
#13475
10K
6.21 mi11:38:2047:447:4123:59
7:43
#13769
15K
9.32 mi12:02:261:11:507:4224:06
7:45
#13808
20K
12.43 mi12:26:101:35:347:4123:44
7:38
#13282
Half
13.11 mi12:31:211:40:457:415:11
7:36
#13228
25K
15.53 mi12:50:001:59:247:4118:39
7:42
#12918
30K
18.64 mi13:14:162:23:407:4224:16
7:49
#12327
20M
20.00 mi13:24:462:34:107:4210:30
7:44
#11984
21M
21.00 mi13:32:432:42:077:437:57
7:57
#11647
35K
21.75 mi13:38:222:47:467:435:39
7:33
#11529
23M
23.00 mi13:47:472:57:117:429:25
7:31
#11162
24M
24.00 mi13:54:543:04:187:417:07
7:07
#10854
40K
24.85 mi14:00:583:10:227:406:04
7:06
#10555
25.2M
25.20 mi14:03:333:12:577:392:35
7:29
#10396
Finish
26.22 mi14:10:203:19:447:376:47
6:39
#10064
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi13475358235821399740094009
10K6.21 mi3.10 mi13769-2943805-2233805-2231407039913991
15K9.32 mi3.11 mi13808-393850-453850-451399740094009
20K12.43 mi3.11 mi13282+5263593+2573593+2571186729242924
Half13.11 mi0.68 mi13228+543574+193574+191255332373237
25K15.53 mi2.42 mi12918+3103428+1463428+1461148028292829
30K18.64 mi3.11 mi12327+5913172+2563172+2561004323102310
20M20.00 mi1.36 mi11984+3433027+1453027+145858317931793
21M21.00 mi1.00 mi11647+3372887+1402887+140711813621362
35K21.75 mi0.75 mi11529+1182853+342853+34905421482148
23M23.00 mi1.25 mi11162+3672698+1552698+155677813121312
24M24.00 mi1.00 mi10854+3082572+1262572+1265350851851
40K24.85 mi0.85 mi10555+2992442+1302442+1304506653653
25.2M25.20 mi0.35 mi10396+1592385+572385+573475442442
Finish26.22 mi1.02 mi10064+3322252+1332252+1333684482482

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

13997

Females

4009

F40-44

4009

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14070

Females

3991

F40-44

3991

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

13997

Females

4009

F40-44

4009

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11867

Females

2924

F40-44

2924

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

12553

Females

3237

F40-44

3237

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11480

Females

2829

F40-44

2829

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

10043

Females

2310

F40-44

2310

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

8583

Females

1793

F40-44

1793

20M→21M

20.0 - 21.0 mi

Top 25%
×8story building
+106ft-24ft

Overall

7118

Females

1362

F40-44

1362

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

9054

Females

2148

F40-44

2148

35K→23M

21.8 - 23.0 mi

Top 24%
×5story building
+23ft-63ft

Overall

6778

Females

1312

F40-44

1312

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5350

Females

851

F40-44

851

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4506

Females

653

F40-44

653

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3475

Females

442

F40-44

442

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2story building
+22ft-21ft

Overall

3684

Females

482

F40-44

482

Passing Analysis

Category:
Athletes Passed
4196
Passed By
785
Net Change
+3411
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13475
5K → 10K176470-294#13475#13769
10K → 15K185224-39#13769#13808
15K → 20K54014+526#13808#13282
20K → Half6612+54#13282#13228
Half → 25K34131+310#13228#12918
25K → 30K60615+591#12918#12327
30K → 20M3485+343#12327#11984
20M → 21M3392+337#11984#11647
21M → 35K1257+118#11647#11529
35K → 23M3703+367#11529#11162
23M → 24M3091+308#11162#10854
24M → 40K2990+299#10854#10555
40K → 25.2M1590+159#10555#10396
25.2M → Finish3331+332#10396#10064
TOTALS4196785+3411

Passing Charts

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