Boston Marathon logo
BOSTON MARATHON 2025

Miriam Corona Chacon

Bib: 14586•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 46%
Masters (Masters Women)
#0 / 6759
Top 33%
Division (F50-54)
#0 / 1303
Top 26%
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
7:32/mi
23:24
↑ 97↓ 3451.5%
10K· 6.21 mi
7:41/mi
47:16
↑ 79↓ 1380.4%
15K· 9.32 mi
7:46/mi
1:11:23
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:36:21
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:41:43
↑ 19↓ 370.5%
25K· 15.53 mi
8:31/mi
2:02:22
↑ 66↓ 880.2%
30K· 18.64 mi
9:38/mi
2:32:17
↑ 181↓ 1480.2%
20M
10:46/mi
2:46:55
↑ 64↓ 500.2%
21M
9:42/mi
2:56:37
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
3:02:58
↑ 17↓ 861.7%
23M
8:48/mi
3:13:59
↑ 23↓ 630.6%
24M
8:12/mi
3:22:11
↓ 821.3%
40K· 24.85 mi
8:22/mi
3:29:20
↓ 200.3%
25.2M
9:49/mi
3:32:43
↑ 13↓ 160.2%
Finish· 26.22 mi
8:42/mi
3:41:35
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:43
Pace7:46 /mi
2nd Half
Distance13.11 mi
Time1:59:52
Pace9:09 /mi
📊Positive Split: 17.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:2023:247:3223:24
7:32
-
10K
6.21 mi11:18:1247:167:3623:52
7:41
+0:09
15K
9.32 mi11:42:191:11:237:4024:07
7:46
+0:05
20K
12.43 mi12:07:171:36:217:4524:58
8:02
+0:16
Half
13.11 mi12:12:391:41:437:465:22
7:52
-0:10
25K
15.53 mi12:33:182:02:227:5320:39
8:31
+0:39
30K
18.64 mi13:03:132:32:178:1029:55
9:38
+1:07
20M
20.00 mi13:17:512:46:558:2114:38
10:46
+1:08
21M
21.00 mi13:27:332:56:378:259:42
9:42
-1:04
35K
21.75 mi13:33:543:02:588:256:21
8:29
-1:13
23M
23.00 mi13:44:553:13:598:2611:01
8:48
+0:19
24M
24.00 mi13:53:073:22:118:258:12
8:12
-0:36
40K
24.85 mi14:00:163:29:208:257:09
8:22
+0:10
25.2M
25.20 mi14:03:393:32:438:263:23
9:49
+1:27
Finish
26.22 mi14:12:313:41:358:278:52
8:42
-1:07

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

7:32 /mi

Average Pace

8:27 /mi

Slowest Pace

10:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:45

35% of race

Time at Steady Pace

1:27:12

39% of race

Time at Slower Pace

57:38

26% of race

Average Pace: 8:27 /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 mi10:54:2023:247:3223:24
7:32
#12548
10K
6.21 mi11:18:1247:167:3623:52
7:41
#13108
15K
9.32 mi11:42:191:11:237:4024:07
7:46
#13398
20K
12.43 mi12:07:171:36:217:4524:58
8:02
#13844
Half
13.11 mi12:12:391:41:437:465:22
7:52
#13895
25K
15.53 mi12:33:182:02:227:5320:39
8:31
#14529
30K
18.64 mi13:03:132:32:178:1029:55
9:38
#16006
20M
20.00 mi13:17:512:46:558:2114:38
10:46
#16800
21M
21.00 mi13:27:332:56:378:259:42
9:42
#16775
35K
21.75 mi13:33:543:02:588:256:21
8:29
#16709
23M
23.00 mi13:44:553:13:598:2611:01
8:48
#16562
24M
24.00 mi13:53:073:22:118:258:12
8:12
#16377
40K
24.85 mi14:00:163:29:208:257:09
8:22
#16230
25.2M
25.20 mi14:03:393:32:438:263:23
9:49
#16222
Finish
26.22 mi14:12:313:41:358:278:52
8:42
#16269
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi125483095309514068(Top 50%)4060(Top 33%)4060(Top 312%)
10K6.21 mi3.10 mi13108-5603406-3113406-31113734(Top 48%)3801(Top 31%)3801(Top 292%)
15K9.32 mi3.11 mi13398-2903626-2203626-22014068(Top 50%)4060(Top 33%)4060(Top 312%)
20K12.43 mi3.11 mi13844-4463927-3013927-30115203(Top 54%)4758(Top 39%)4758(Top 365%)
Half13.11 mi0.68 mi13895-513952-253952-2514895(Top 52%)4573(Top 37%)4573(Top 351%)
25K15.53 mi2.42 mi14529-6344350-3984350-39817307(Top 61%)6029(Top 49%)6029(Top 463%)
30K18.64 mi3.11 mi16006-14775223-8735223-87320472(Top 72%)7919(Top 65%)7919(Top 608%)
20M20.00 mi1.36 mi16800-7945717-4945717-49423109(Top 81%)9471(Top 77%)9471(Top 727%)
21M21.00 mi1.00 mi16775+255745-285745-2817046(Top 60%)6280(Top 51%)6280(Top 482%)
35K21.75 mi0.75 mi16709+665722+235722+2315426(Top 54%)5482(Top 45%)5482(Top 421%)
23M23.00 mi1.25 mi16562+1475674+485674+4815128(Top 53%)5407(Top 44%)5407(Top 415%)
24M24.00 mi1.00 mi16377+1855593+815593+8112619(Top 44%)4130(Top 34%)4130(Top 317%)
40K24.85 mi0.85 mi16230+1475531+625531+6212597(Top 44%)4250(Top 35%)4250(Top 326%)
25.2M25.20 mi0.35 mi16222+85538-75538-716186(Top 57%)6171(Top 50%)6171(Top 474%)
Finish26.22 mi1.02 mi16269-475583-455583-4517483(Top 62%)6805(Top 56%)6805(Top 522%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14068

Females

4060

F50-54

4060

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13734

Females

3801

F50-54

3801

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14068

Females

4060

F50-54

4060

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15203

Females

4758

F50-54

4758

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14895

Females

4573

F50-54

4573

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17307

Females

6029

F50-54

6029

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20472

Females

7919

F50-54

7919

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

23109

Females

9471

F50-54

9471

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

17046

Females

6280

F50-54

6280

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15426

Females

5482

F50-54

5482

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

15128

Females

5407

F50-54

5407

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12619

Females

4130

F50-54

4130

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12597

Females

4250

F50-54

4250

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16186

Females

6171

F50-54

6171

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17483

Females

6805

F50-54

6805

Passing Analysis

Category:
Athletes Passed
1292
Passed By
5013
Net Change
-3721
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12548
5K → 10K105665-560#12548#13108
10K → 15K111401-290#13108#13398
15K → 20K103549-446#13398#13844
20K → Half1869-51#13844#13895
Half → 25K61695-634#13895#14529
25K → 30K301507-1477#14529#16006
30K → 20M14808-794#16006#16800
20M → 21M12398+25#16800#16775
21M → 35K9327+66#16775#16709
35K → 23M18538+147#16709#16562
23M → 24M19712+185#16562#16377
24M → 40K15811+147#16377#16230
40K → 25.2M3426+8#16230#16222
25.2M → Finish60107-47#16222#16269
TOTALS12925013-3721
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing