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BOSTON MARATHON 2025

Danielle Groendyk

Bib: 9001•F

MI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 15%
Gender (Female)
#0 / 12228
Top 3%
Division (F18-39)
#0 / 5469
Top 5%
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
6:39/mi
20:39
↑ 97↓ 3451.5%
10K· 6.21 mi
6:38/mi
41:17
↑ 79↓ 1380.4%
15K· 9.32 mi
6:38/mi
1:01:55
↑ 67↓ 78
20K· 12.43 mi
6:45/mi
1:22:54
↑ 106↓ 860.1%
Half· 13.11 mi
6:42/mi
1:27:28
↑ 19↓ 370.5%
25K· 15.53 mi
6:51/mi
1:44:04
↑ 66↓ 880.2%
30K· 18.64 mi
7:06/mi
2:06:08
↑ 181↓ 1480.2%
20M
7:10/mi
2:15:52
↑ 64↓ 500.2%
21M
7:17/mi
2:23:09
↑ 106↓ 241.6%
35K· 21.75 mi
6:46/mi
2:28:13
↑ 17↓ 861.7%
23M
7:01/mi
2:37:00
↑ 23↓ 630.6%
24M
6:47/mi
2:43:47
↓ 821.3%
40K· 24.85 mi
6:51/mi
2:49:38
↓ 200.3%
25.2M
7:09/mi
2:52:06
↑ 13↓ 160.2%
Finish· 26.22 mi
6:21/mi
2:58:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:28
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:31:06
Pace6:57 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:5020:396:3920:39
6:39
-
10K
6.21 mi11:06:2841:176:3920:38
6:38
-0:01
15K
9.32 mi11:27:061:01:556:3920:38
6:38
0:00
20K
12.43 mi11:48:051:22:546:4020:59
6:45
+0:07
Half
13.11 mi11:52:391:27:286:404:34
6:42
-0:03
25K
15.53 mi12:09:151:44:046:4216:36
6:51
+0:09
30K
18.64 mi12:31:192:06:086:4622:04
7:06
+0:15
20M
20.00 mi12:41:032:15:526:489:44
7:10
+0:04
21M
21.00 mi12:48:202:23:096:497:17
7:17
+0:07
35K
21.75 mi12:53:242:28:136:495:04
6:46
-0:31
23M
23.00 mi13:02:112:37:006:508:47
7:01
+0:15
24M
24.00 mi13:08:582:43:476:496:47
6:47
-0:14
40K
24.85 mi13:14:492:49:386:495:51
6:51
+0:04
25.2M
25.20 mi13:17:172:52:066:502:28
7:09
+0:18
Finish
26.22 mi13:23:452:58:346:496:28
6:21
-0:48

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

6:21 /mi

Average Pace

6:49 /mi

Slowest Pace

7:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:08:14

72% of race

Time at Steady Pace

50:20

28% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:49 /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 mi10:45:5020:396:3920:39
6:39
#5011
10K
6.21 mi11:06:2841:176:3920:38
6:38
#4878
15K
9.32 mi11:27:061:01:556:3920:38
6:38
#4746
20K
12.43 mi11:48:051:22:546:4020:59
6:45
#4745
Half
13.11 mi11:52:391:27:286:404:34
6:42
#4757
25K
15.53 mi12:09:151:44:046:4216:36
6:51
#4792
30K
18.64 mi12:31:192:06:086:4622:04
7:06
#4890
20M
20.00 mi12:41:032:15:526:489:44
7:10
#4874
21M
21.00 mi12:48:202:23:096:497:17
7:17
#4749
35K
21.75 mi12:53:242:28:136:495:04
6:46
#4682
23M
23.00 mi13:02:112:37:006:508:47
7:01
#4596
24M
24.00 mi13:08:582:43:476:496:47
6:47
#4507
40K
24.85 mi13:14:492:49:386:495:51
6:51
#4422
25.2M
25.20 mi13:17:172:52:066:502:28
7:09
#4349
Finish
26.22 mi13:23:452:58:346:496:28
6:21
#4203
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi50113193194603(Top 16%)286(Top 2%)286(Top 5%)
10K6.21 mi3.10 mi4878+133312+7312+74820(Top 17%)303(Top 2%)303(Top 6%)
15K9.32 mi3.11 mi4746+132297+15297+154603(Top 16%)286(Top 2%)286(Top 5%)
20K12.43 mi3.11 mi4745+1308-11308-114892(Top 17%)358(Top 3%)358(Top 7%)
Half13.11 mi0.68 mi4757-12310-2310-25293(Top 19%)399(Top 3%)399(Top 7%)
25K15.53 mi2.42 mi4792-35325-15325-155259(Top 19%)426(Top 3%)426(Top 8%)
30K18.64 mi3.11 mi4890-98358-33358-335336(Top 19%)513(Top 4%)513(Top 9%)
20M20.00 mi1.36 mi4874+163583585014(Top 18%)503(Top 4%)503(Top 9%)
21M21.00 mi1.00 mi4749+125346+12346+123577(Top 13%)293(Top 2%)293(Top 5%)
35K21.75 mi0.75 mi4682+67345+1345+14001(Top 14%)395(Top 3%)395(Top 7%)
23M23.00 mi1.25 mi4596+86346-1346-13875(Top 14%)380(Top 3%)380(Top 7%)
24M24.00 mi1.00 mi4507+89340+6340+63441(Top 12%)338(Top 3%)338(Top 6%)
40K24.85 mi0.85 mi4422+85338+2338+23096(Top 11%)303(Top 2%)303(Top 6%)
25.2M25.20 mi0.35 mi4349+73332+6332+62041(Top 7%)191(Top 2%)191(Top 3%)
Finish26.22 mi1.02 mi4203+146320+12320+122109(Top 7%)172(Top 1%)172(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21story building
+97ft-345ft

Overall

4603

Females

286

F18-39

286

5K→10K

3.1 - 6.2 mi

Top 17%
×5story building
+79ft-138ft

Overall

4820

Females

303

F18-39

303

10K→15K

6.2 - 9.3 mi

Top 16%
×3story building
+67ft-78ft

Overall

4603

Females

286

F18-39

286

15K→20K

9.3 - 12.4 mi

Top 17%
×5story building
+106ft-86ft

Overall

4892

Females

358

F18-39

358

20K→Half

12.4 - 13.1 mi

Top 19%
×2story building
+19ft-37ft

Overall

5293

Females

399

F18-39

399

Half→25K

13.1 - 15.5 mi

Top 19%
×4story building
+66ft-88ft

Overall

5259

Females

426

F18-39

426

25K→30K

15.5 - 18.6 mi

Top 19%
×9story building
+181ft-148ft

Overall

5336

Females

513

F18-39

513

30K→20M

18.6 - 20.0 mi

Top 18%
×5story building
+64ft-50ft

Overall

5014

Females

503

F18-39

503

20M→21M

20.0 - 21.0 mi

Top 13%
×8story building
+106ft-24ft

Overall

3577

Females

293

F18-39

293

21M→35K

21.0 - 21.8 mi

Top 14%
×7story building
+17ft-86ft

Overall

4001

Females

395

F18-39

395

35K→23M

21.8 - 23.0 mi

Top 14%
×5story building
+23ft-63ft

Overall

3875

Females

380

F18-39

380

23M→24M

23.0 - 24.0 mi

Top 12%
×6story building
+12ft-82ft

Overall

3441

Females

338

F18-39

338

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3096

Females

303

F18-39

303

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

2041

Females

191

F18-39

191

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2story building
+22ft-21ft

Overall

2109

Females

172

F18-39

172

Passing Analysis

Category:
Athletes Passed
1643
Passed By
835
Net Change
+808
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5011
5K → 10K246113+133#5011#4878
10K → 15K18149+132#4878#4746
15K → 20K127126+1#4746#4745
20K → Half1830-12#4745#4757
Half → 25K93128-35#4757#4792
25K → 30K133231-98#4792#4890
30K → 20M7963+16#4890#4874
20M → 21M13712+125#4874#4749
21M → 35K8114+67#4749#4682
35K → 23M11731+86#4682#4596
23M → 24M11627+89#4596#4507
24M → 40K916+85#4507#4422
40K → 25.2M730+73#4422#4349
25.2M → Finish1515+146#4349#4203
TOTALS1643835+808
📊

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