Boston Marathon logo
BOSTON MARATHON 2025

Simona Corna

Bib: 20759•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 46%
Division (F40-44)
#0 / 1718
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
8:21/mi
25:58
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
51:54
↑ 79↓ 1380.4%
15K· 9.32 mi
8:22/mi
1:17:54
↑ 67↓ 78
20K· 12.43 mi
8:21/mi
1:43:49
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:49:26
↑ 19↓ 370.5%
25K· 15.53 mi
8:30/mi
2:10:03
↑ 66↓ 880.2%
30K· 18.64 mi
8:46/mi
2:37:16
↑ 181↓ 1480.2%
20M
9:21/mi
2:49:59
↑ 64↓ 500.2%
21M
9:54/mi
2:59:53
↑ 106↓ 241.6%
35K· 21.75 mi
9:07/mi
3:06:42
↑ 17↓ 861.7%
23M
9:20/mi
3:18:23
↑ 23↓ 630.6%
24M
9:29/mi
3:27:52
↓ 821.3%
40K· 24.85 mi
9:49/mi
3:36:16
↓ 200.3%
25.2M
10:38/mi
3:39:56
↑ 13↓ 160.2%
Finish· 26.22 mi
9:35/mi
3:49:42
↑ 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
Time1:49:26
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time2:00:16
Pace9:10 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3625:588:2125:58
8:21
-
10K
6.21 mi11:44:3251:548:2125:56
8:21
0:00
15K
9.32 mi12:10:321:17:548:2126:00
8:22
+0:01
20K
12.43 mi12:36:271:43:498:2125:55
8:21
-0:01
Half
13.11 mi12:42:041:49:268:215:37
8:14
-0:07
25K
15.53 mi13:02:412:10:038:2220:37
8:30
+0:16
30K
18.64 mi13:29:542:37:168:2627:13
8:46
+0:16
20M
20.00 mi13:42:372:49:598:3012:43
9:21
+0:35
21M
21.00 mi13:52:312:59:538:349:54
9:54
+0:33
35K
21.75 mi13:59:203:06:428:356:49
9:07
-0:47
23M
23.00 mi14:11:013:18:238:3811:41
9:20
+0:13
24M
24.00 mi14:20:303:27:528:409:29
9:29
+0:09
40K
24.85 mi14:28:543:36:168:428:24
9:49
+0:20
25.2M
25.20 mi14:32:343:39:568:443:40
10:38
+0:49
Finish
26.22 mi14:42:203:49:428:469:46
9:35
-1:03

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

8:14 /mi

Average Pace

8:46 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:03

57% of race

Time at Steady Pace

58:26

25% of race

Time at Slower Pace

41:13

18% of race

Average Pace: 8:46 /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 mi11:18:3625:588:2125:58
8:21
#19062
10K
6.21 mi11:44:3251:548:2125:56
8:21
#18952
15K
9.32 mi12:10:321:17:548:2126:00
8:22
#18783
20K
12.43 mi12:36:271:43:498:2125:55
8:21
#18338
Half
13.11 mi12:42:041:49:268:215:37
8:14
#18294
25K
15.53 mi13:02:412:10:038:2220:37
8:30
#18074
30K
18.64 mi13:29:542:37:168:2627:13
8:46
#17710
20M
20.00 mi13:42:372:49:598:3012:43
9:21
#17776
21M
21.00 mi13:52:312:59:538:349:54
9:54
#17796
35K
21.75 mi13:59:203:06:428:356:49
9:07
#17824
23M
23.00 mi14:11:013:18:238:3811:41
9:20
#17828
24M
24.00 mi14:20:303:27:528:409:29
9:29
#17911
40K
24.85 mi14:28:543:36:168:428:24
9:49
#18022
25.2M
25.20 mi14:32:343:39:568:443:40
10:38
#18065
Finish
26.22 mi14:42:203:49:428:469:46
9:35
#18248
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi190626944694418515(Top 65%)6614(Top 54%)6614(Top 385%)
10K6.21 mi3.10 mi18952+1106879+656879+6518865(Top 66%)6804(Top 56%)6804(Top 396%)
15K9.32 mi3.11 mi18783+1696780+996780+9918515(Top 65%)6614(Top 54%)6614(Top 385%)
20K12.43 mi3.11 mi18338+4456534+2466534+24617188(Top 61%)5883(Top 48%)5883(Top 342%)
Half13.11 mi0.68 mi18294+446514+206514+2017560(Top 62%)6086(Top 50%)6086(Top 354%)
25K15.53 mi2.42 mi18074+2206405+1096405+10917243(Top 61%)6001(Top 49%)6001(Top 349%)
30K18.64 mi3.11 mi17710+3646237+1686237+16816377(Top 58%)5679(Top 46%)5679(Top 331%)
20M20.00 mi1.36 mi17776-666303-666303-6618564(Top 65%)7034(Top 58%)7034(Top 409%)
21M21.00 mi1.00 mi17796-206322-196322-1917916(Top 63%)6746(Top 55%)6746(Top 393%)
35K21.75 mi0.75 mi17824-286347-256347-2518792(Top 66%)7343(Top 60%)7343(Top 427%)
23M23.00 mi1.25 mi17828-46398-516398-5117944(Top 63%)6959(Top 57%)6959(Top 405%)
24M24.00 mi1.00 mi17911-836476-786476-7819587(Top 69%)7873(Top 64%)7873(Top 458%)
40K24.85 mi0.85 mi18022-1116558-826558-8219897(Top 70%)8093(Top 66%)8093(Top 471%)
25.2M25.20 mi0.35 mi18065-436588-306588-3019506(Top 69%)7893(Top 65%)7893(Top 459%)
Finish26.22 mi1.02 mi18248-1836714-1266714-12621494(Top 76%)8901(Top 73%)8901(Top 518%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18515

Females

6614

F40-44

6614

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

18865

Females

6804

F40-44

6804

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18515

Females

6614

F40-44

6614

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

17188

Females

5883

F40-44

5883

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

17560

Females

6086

F40-44

6086

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17243

Females

6001

F40-44

6001

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16377

Females

5679

F40-44

5679

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18564

Females

7034

F40-44

7034

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

17916

Females

6746

F40-44

6746

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

18792

Females

7343

F40-44

7343

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

17944

Females

6959

F40-44

6959

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

19587

Females

7873

F40-44

7873

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

19897

Females

8093

F40-44

8093

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19506

Females

7893

F40-44

7893

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

21494

Females

8901

F40-44

8901

Passing Analysis

Category:
Athletes Passed
2319
Passed By
1505
Net Change
+814
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19062
5K → 10K314204+110#19062#18952
10K → 15K278109+169#18952#18783
15K → 20K47934+445#18783#18338
20K → Half5814+44#18338#18294
Half → 25K28161+220#18294#18074
25K → 30K42965+364#18074#17710
30K → 20M102168-66#17710#17776
20M → 21M91111-20#17776#17796
21M → 35K5785-28#17796#17824
35K → 23M105109-4#17824#17828
23M → 24M59142-83#17828#17911
24M → 40K35146-111#17911#18022
40K → 25.2M1356-43#18022#18065
25.2M → Finish18201-183#18065#18248
TOTALS23191505+814
📊

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