Boston Marathon logo
BOSTON MARATHON 2025

Cynthia Achecar Justo

Bib: 20934•F

TX

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 50%
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:31
Rank: #20104
Start → 5K
26:31 | 8:32/mi
10K· 6.21 mi
52:48
Rank: #19833 (+271)
5K → 10K
26:17 | 8:28/mi
15K· 9.32 mi
1:18:57
Rank: #19489 (+344)
10K → 15K
26:09 | 8:25/mi
20K· 12.43 mi
1:45:23
Rank: #19150 (+339)
15K → 20K
26:26 | 8:30/mi
Half· 13.11 mi
1:51:04
Rank: #19083 (+67)
20K → Half
5:41 | 8:20/mi
25K· 15.53 mi
2:11:49
Rank: #18829 (+254)
Half → 25K
20:45 | 8:33/mi
30K· 18.64 mi
2:39:47
Rank: #18588 (+241)
25K → 30K
27:58 | 9:00/mi
20M
2:52:18
Rank: #18522 (+66)
30K → 20M
12:31 | 9:13/mi
21M
3:02:12
Rank: #18460 (+62)
20M → 21M
9:54 | 9:54/mi
35K· 21.75 mi
3:09:01
Rank: #18491 (-31)
21M → 35K
6:49 | 9:07/mi
23M
3:20:54
Rank: #18489 (+2)
35K → 23M
11:53 | 9:29/mi
24M
3:30:34
Rank: #18603 (-114)
23M → 24M
9:40 | 9:40/mi
40K· 24.85 mi
3:38:55
Rank: #18663 (-60)
24M → 40K
8:21 | 9:46/mi
25.2M
3:42:59
Rank: #18778 (-115)
40K → 25.2M
4:04 | 11:48/mi
Finish· 26.22 mi
3:52:59
Rank: #18949 (-171)
25.2M → Finish
10:00 | 9:49/mi

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
Time1:51:04
Pace8:28 /mi
2nd Half
Distance13.11 mi
Time2:01:55
Pace9:18 /mi
📊Positive Split: 9.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1626:318:3226:31
8:32
-
10K
6.21 mi11:45:3352:488:3026:17
8:28
-0:04
15K
9.32 mi12:11:421:18:578:2826:09
8:25
-0:03
20K
12.43 mi12:38:081:45:238:2926:26
8:30
+0:05
Half
13.11 mi12:43:491:51:048:285:41
8:20
-0:10
25K
15.53 mi13:04:342:11:498:2920:45
8:33
+0:13
30K
18.64 mi13:32:322:39:478:3427:58
9:00
+0:27
20M
20.00 mi13:45:032:52:188:3712:31
9:13
+0:13
21M
21.00 mi13:54:573:02:128:419:54
9:54
+0:41
35K
21.75 mi14:01:463:09:018:416:49
9:07
-0:47
23M
23.00 mi14:13:393:20:548:4411:53
9:29
+0:22
24M
24.00 mi14:23:193:30:348:469:40
9:40
+0:11
40K
24.85 mi14:31:403:38:558:488:21
9:46
+0:06
25.2M
25.20 mi14:35:443:42:598:514:04
11:48
+2:02
Finish
26.22 mi14:45:443:52:598:5410:00
9:49
-1:59

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

8:20 /mi

Average Pace

8:54 /mi

Slowest Pace

11:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:49

57% of race

Time at Steady Pace

59:11

25% of race

Time at Slower Pace

41:59

18% of race

Average Pace: 8:53 /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 mi11:19:1626:318:3226:31
8:32
#20104
10K
6.21 mi11:45:3352:488:3026:17
8:28
#19833
15K
9.32 mi12:11:421:18:578:2826:09
8:25
#19489
20K
12.43 mi12:38:081:45:238:2926:26
8:30
#19150
Half
13.11 mi12:43:491:51:048:285:41
8:20
#19083
25K
15.53 mi13:04:342:11:498:2920:45
8:33
#18829
30K
18.64 mi13:32:322:39:478:3427:58
9:00
#18588
20M
20.00 mi13:45:032:52:188:3712:31
9:13
#18522
21M
21.00 mi13:54:573:02:128:419:54
9:54
#18460
35K
21.75 mi14:01:463:09:018:416:49
9:07
#18491
23M
23.00 mi14:13:393:20:548:4411:53
9:29
#18489
24M
24.00 mi14:23:193:30:348:469:40
9:40
#18603
40K
24.85 mi14:31:403:38:558:488:21
9:46
#18663
25.2M
25.20 mi14:35:443:42:598:514:04
11:48
#18778
Finish
26.22 mi14:45:443:52:598:5410:00
9:49
#18949
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi201047559755918824(Top 66%)6796(Top 56%)6796(Top 396%)
10K6.21 mi3.10 mi19833+2717374+1857374+18519579(Top 69%)7221(Top 59%)7221(Top 420%)
15K9.32 mi3.11 mi19489+3447173+2017173+20118824(Top 66%)6796(Top 56%)6796(Top 396%)
20K12.43 mi3.11 mi19150+3396990+1836990+18318322(Top 65%)6515(Top 53%)6515(Top 379%)
Half13.11 mi0.68 mi19083+676953+376953+3718203(Top 64%)6453(Top 53%)6453(Top 376%)
25K15.53 mi2.42 mi18829+2546814+1396814+13917553(Top 62%)6171(Top 50%)6171(Top 359%)
30K18.64 mi3.11 mi18588+2416711+1036711+10317719(Top 62%)6427(Top 53%)6427(Top 374%)
20M20.00 mi1.36 mi18522+666703+86703+817847(Top 63%)6621(Top 54%)6621(Top 385%)
21M21.00 mi1.00 mi18460+626701+26701+217922(Top 63%)6752(Top 55%)6752(Top 393%)
35K21.75 mi0.75 mi18491-316734-336734-3318796(Top 66%)7347(Top 60%)7347(Top 428%)
23M23.00 mi1.25 mi18489+26758-246758-2418674(Top 66%)7334(Top 60%)7334(Top 427%)
24M24.00 mi1.00 mi18603-1146850-926850-9220276(Top 71%)8223(Top 67%)8223(Top 479%)
40K24.85 mi0.85 mi18663-606911-616911-6119707(Top 69%)7993(Top 65%)7993(Top 465%)
25.2M25.20 mi0.35 mi18778-1156987-766987-7622777(Top 80%)9545(Top 78%)9545(Top 556%)
Finish26.22 mi1.02 mi18949-1717100-1137100-11322330(Top 79%)9335(Top 76%)9335(Top 543%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21stories
+97ft-345ft

Overall

18824

Females

6796

F40-44

6796

5K→10K

3.1 - 6.2 mi

Top 69%
×5stories
+79ft-138ft

Overall

19579

Females

7221

F40-44

7221

10K→15K

6.2 - 9.3 mi

Top 66%
×3stories
+67ft-78ft

Overall

18824

Females

6796

F40-44

6796

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

18322

Females

6515

F40-44

6515

20K→Half

12.4 - 13.1 mi

Top 64%
×2stories
+19ft-37ft

Overall

18203

Females

6453

F40-44

6453

Half→25K

13.1 - 15.5 mi

Top 62%
×4stories
+66ft-88ft

Overall

17553

Females

6171

F40-44

6171

25K→30K

15.5 - 18.6 mi

Top 62%
×9stories
+181ft-148ft

Overall

17719

Females

6427

F40-44

6427

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

17847

Females

6621

F40-44

6621

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

17922

Females

6752

F40-44

6752

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

18796

Females

7347

F40-44

7347

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

18674

Females

7334

F40-44

7334

23M→24M

23.0 - 24.0 mi

Top 71%
×6stories
+12ft-82ft

Overall

20276

Females

8223

F40-44

8223

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19707

Females

7993

F40-44

7993

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

22777

Females

9545

F40-44

9545

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2stories
+22ft-21ft

Overall

22330

Females

9335

F40-44

9335

Passing Analysis

Category:
Athletes Passed
2509
Passed By
1354
Net Change
+1155
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20104
5K → 10K442171+271#20104#19833
10K → 15K40460+344#19833#19489
15K → 20K37738+339#19489#19150
20K → Half7811+67#19150#19083
Half → 25K29238+254#19083#18829
25K → 30K363122+241#18829#18588
30K → 20M13973+66#18588#18522
20M → 21M13472+62#18522#18460
21M → 35K4374-31#18460#18491
35K → 23M109107+2#18491#18489
23M → 24M39153-114#18489#18603
24M → 40K59119-60#18603#18663
40K → 25.2M11126-115#18663#18778
25.2M → Finish19190-171#18778#18949
TOTALS25091354+1155
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing