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BOSTON MARATHON 2025

Sierra Vielmette

Bib: 7892•F

TN

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 19%
Gender (Female)
#0 / 12228
Top 4%
Division (F18-39)
#0 / 5469
Top 8%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:29
Rank: #4558
Start → 5K
20:29 | 6:36/mi
10K· 6.21 mi
41:16
Rank: #4847 (-289)
5K → 10K
20:47 | 6:41/mi
15K· 9.32 mi
1:02:16
Rank: #5073 (-226)
10K → 15K
21:00 | 6:46/mi
20K· 12.43 mi
1:22:57
Rank: #4781 (+292)
15K → 20K
20:41 | 6:39/mi
Half· 13.11 mi
1:27:25
Rank: #4727 (+54)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:43:49
Rank: #4656 (+71)
Half → 25K
16:24 | 6:46/mi
30K· 18.64 mi
2:05:02
Rank: #4373 (+283)
25K → 30K
21:13 | 6:50/mi
20M
2:14:27
Rank: #4284 (+89)
30K → 20M
9:25 | 6:56/mi
21M
2:22:05
Rank: #4328 (-44)
20M → 21M
7:38 | 7:38/mi
35K· 21.75 mi
2:27:12
Rank: #4315 (+13)
21M → 35K
5:07 | 6:50/mi
23M
2:36:38
Rank: #4460 (-145)
35K → 23M
9:26 | 7:32/mi
24M
2:44:18
Rank: #4691 (-231)
23M → 24M
7:40 | 7:40/mi
40K· 24.85 mi
2:51:20
Rank: #4980 (-289)
24M → 40K
7:02 | 8:14/mi
25.2M
2:54:44
Rank: #5119 (-139)
40K → 25.2M
3:24 | 9:52/mi
Finish· 26.22 mi
3:03:13
Rank: #5359 (-240)
25.2M → Finish
8:29 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:25
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:35:48
Pace7:18 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:4920:296:3620:29
6:36
-
10K
6.21 mi10:49:3641:166:3820:47
6:41
+0:05
15K
9.32 mi11:10:361:02:166:4121:00
6:46
+0:05
20K
12.43 mi11:31:171:22:576:4020:41
6:39
-0:07
Half
13.11 mi11:35:451:27:256:404:28
6:33
-0:06
25K
15.53 mi11:52:091:43:496:4116:24
6:46
+0:13
30K
18.64 mi12:13:222:05:026:4221:13
6:50
+0:04
20M
20.00 mi12:22:472:14:276:439:25
6:56
+0:06
21M
21.00 mi12:30:252:22:056:467:38
7:38
+0:42
35K
21.75 mi12:35:322:27:126:465:07
6:50
-0:48
23M
23.00 mi12:44:582:36:386:499:26
7:32
+0:42
24M
24.00 mi12:52:382:44:186:517:40
7:40
+0:08
40K
24.85 mi12:59:402:51:206:547:02
8:14
+0:34
25.2M
25.20 mi13:03:042:54:446:563:24
9:52
+1:38
Finish
26.22 mi13:11:333:03:137:008:29
8:19
-1:33

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

6:33 /mi

Average Pace

7:00 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:19:34

76% of race

Time at Slower Pace

43:39

24% of race

Average Pace: 6:59 /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 mi10:28:4920:296:3620:29
6:36
#4558
10K
6.21 mi10:49:3641:166:3820:47
6:41
#4847
15K
9.32 mi11:10:361:02:166:4121:00
6:46
#5073
20K
12.43 mi11:31:171:22:576:4020:41
6:39
#4781
Half
13.11 mi11:35:451:27:256:404:28
6:33
#4727
25K
15.53 mi11:52:091:43:496:4116:24
6:46
#4656
30K
18.64 mi12:13:222:05:026:4221:13
6:50
#4373
20M
20.00 mi12:22:472:14:276:439:25
6:56
#4284
21M
21.00 mi12:30:252:22:056:467:38
7:38
#4328
35K
21.75 mi12:35:322:27:126:465:07
6:50
#4315
23M
23.00 mi12:44:582:36:386:499:26
7:32
#4460
24M
24.00 mi12:52:382:44:186:517:40
7:40
#4691
40K
24.85 mi12:59:402:51:206:547:02
8:14
#4980
25.2M
25.20 mi13:03:042:54:446:563:24
9:52
#5119
Finish
26.22 mi13:11:333:03:137:008:29
8:19
#5359
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi45582702705707(Top 20%)489(Top 4%)489(Top 9%)
10K6.21 mi3.10 mi4847-289309-39309-395278(Top 19%)375(Top 3%)375(Top 7%)
15K9.32 mi3.11 mi5073-226340-31340-315707(Top 20%)489(Top 4%)489(Top 9%)
20K12.43 mi3.11 mi4781+292311+29311+294086(Top 14%)244(Top 2%)244(Top 4%)
Half13.11 mi0.68 mi4727+54305+6305+64091(Top 14%)247(Top 2%)247(Top 5%)
25K15.53 mi2.42 mi4656+713053054620(Top 16%)347(Top 3%)347(Top 6%)
30K18.64 mi3.11 mi4373+283273+32273+323639(Top 13%)258(Top 2%)258(Top 5%)
20M20.00 mi1.36 mi4284+89271+2271+23720(Top 13%)289(Top 2%)289(Top 5%)
21M21.00 mi1.00 mi4328-44291-20291-205314(Top 19%)689(Top 6%)689(Top 13%)
35K21.75 mi0.75 mi4315+13296-5296-54410(Top 16%)469(Top 4%)469(Top 9%)
23M23.00 mi1.25 mi4460-145324-28324-286833(Top 24%)1316(Top 11%)1316(Top 24%)
24M24.00 mi1.00 mi4691-231367-43367-438905(Top 31%)2268(Top 19%)2268(Top 41%)
40K24.85 mi0.85 mi4980-289421-54421-5411721(Top 41%)3756(Top 31%)3756(Top 69%)
25.2M25.20 mi0.35 mi5119-139450-29450-2916387(Top 58%)6248(Top 51%)6248(Top 114%)
Finish26.22 mi1.02 mi5359-240512-62512-6215073(Top 53%)5510(Top 45%)5510(Top 101%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5707

Females

489

F18-39

489

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5278

Females

375

F18-39

375

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5707

Females

489

F18-39

489

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

4086

Females

244

F18-39

244

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

4091

Females

247

F18-39

247

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4620

Females

347

F18-39

347

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3639

Females

258

F18-39

258

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3720

Females

289

F18-39

289

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5314

Females

689

F18-39

689

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4410

Females

469

F18-39

469

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6833

Females

1316

F18-39

1316

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8905

Females

2268

F18-39

2268

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11721

Females

3756

F18-39

3756

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16387

Females

6248

F18-39

6248

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

15073

Females

5510

F18-39

5510

Passing Analysis

Category:
Athletes Passed
1242
Passed By
2043
Net Change
-801
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4558
5K → 10K74363-289#4558#4847
10K → 15K54280-226#4847#5073
15K → 20K30311+292#5073#4781
20K → Half606+54#4781#4727
Half → 25K13463+71#4727#4656
25K → 30K30522+283#4656#4373
30K → 20M11728+89#4373#4284
20M → 21M5498-44#4284#4328
21M → 35K4936+13#4328#4315
35K → 23M42187-145#4315#4460
23M → 24M24255-231#4460#4691
24M → 40K13302-289#4691#4980
40K → 25.2M4143-139#4980#5119
25.2M → Finish9249-240#5119#5359
TOTALS12422043-801
📊

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