Boston Marathon logo
BOSTON MARATHON 2025

Ling Deng

Bib: 24309•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
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
8:44/mi
27:09
↑ 97↓ 3451.5%
10K· 6.21 mi
9:01/mi
55:11
↑ 79↓ 1380.4%
15K· 9.32 mi
8:57/mi
1:23:00
↑ 67↓ 78
20K· 12.43 mi
9:07/mi
1:51:21
↑ 106↓ 860.1%
Half· 13.11 mi
9:02/mi
1:57:31
↑ 19↓ 370.5%
25K· 15.53 mi
9:12/mi
2:19:49
↑ 66↓ 880.2%
30K· 18.64 mi
9:36/mi
2:49:40
↑ 181↓ 1480.2%
20M
9:56/mi
3:03:10
↑ 64↓ 500.2%
21M
10:47/mi
3:13:57
↑ 106↓ 241.6%
35K· 21.75 mi
9:20/mi
3:20:56
↑ 17↓ 861.7%
23M
9:51/mi
3:33:16
↑ 23↓ 630.6%
24M
9:36/mi
3:42:52
↓ 821.3%
40K· 24.85 mi
9:40/mi
3:51:08
↓ 200.3%
25.2M
11:13/mi
3:55:00
↑ 13↓ 160.2%
Finish· 26.22 mi
9:10/mi
4:04:20
↑ 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
Time1:57:31
Pace8:58 /mi
2nd Half
Distance13.11 mi
Time2:06:49
Pace9:40 /mi
📊Positive Split: 7.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4927:098:4427:09
8:44
-
10K
6.21 mi11:53:5155:118:5328:02
9:01
+0:17
15K
9.32 mi12:21:401:23:008:5427:49
8:57
-0:04
20K
12.43 mi12:50:011:51:218:5828:21
9:07
+0:10
Half
13.11 mi12:56:111:57:318:586:10
9:02
-0:05
25K
15.53 mi13:18:292:19:499:0022:18
9:12
+0:10
30K
18.64 mi13:48:202:49:409:0629:51
9:36
+0:24
20M
20.00 mi14:01:503:03:109:0913:30
9:56
+0:20
21M
21.00 mi14:12:373:13:579:1410:47
10:47
+0:51
35K
21.75 mi14:19:363:20:569:146:59
9:20
-1:27
23M
23.00 mi14:31:563:33:169:1612:20
9:51
+0:31
24M
24.00 mi14:41:323:42:529:179:36
9:36
-0:15
40K
24.85 mi14:49:483:51:089:188:16
9:40
+0:04
25.2M
25.20 mi14:53:403:55:009:203:52
11:13
+1:33
Finish
26.22 mi15:03:004:04:209:209:20
9:10
-2:03

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

8:44 /mi

Average Pace

9:20 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

54:58

22% of race

Time at Steady Pace

2:20:37

58% of race

Time at Slower Pace

48:45

20% of race

Average Pace: 9:19 /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 mi11:25:4927:098:4427:09
8:44
#21205
10K
6.21 mi11:53:5155:118:5328:02
9:01
#21877
15K
9.32 mi12:21:401:23:008:5427:49
8:57
#21839
20K
12.43 mi12:50:011:51:218:5828:21
9:07
#21754
Half
13.11 mi12:56:111:57:318:586:10
9:02
#21768
25K
15.53 mi13:18:292:19:499:0022:18
9:12
#21553
30K
18.64 mi13:48:202:49:409:0629:51
9:36
#21345
20M
20.00 mi14:01:503:03:109:0913:30
9:56
#21283
21M
21.00 mi14:12:373:13:579:1410:47
10:47
#21276
35K
21.75 mi14:19:363:20:569:146:59
9:20
#21201
23M
23.00 mi14:31:563:33:169:1612:20
9:51
#21109
24M
24.00 mi14:41:323:42:529:179:36
9:36
#21060
40K
24.85 mi14:49:483:51:089:188:16
9:40
#20997
25.2M
25.20 mi14:53:403:55:009:203:52
11:13
#20994
Finish
26.22 mi15:03:004:04:209:209:20
9:10
#20944
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi212058200820021827(Top 77%)8450(Top 69%)8450(Top 850%)
10K6.21 mi3.10 mi21877-6728539-3398539-33922487(Top 79%)8856(Top 72%)8856(Top 891%)
15K9.32 mi3.11 mi21839+388510+298510+2921827(Top 77%)8450(Top 69%)8450(Top 850%)
20K12.43 mi3.11 mi21754+858466+448466+4421577(Top 76%)8357(Top 68%)8357(Top 841%)
Half13.11 mi0.68 mi21768-148477-118477-1121994(Top 77%)8599(Top 70%)8599(Top 865%)
25K15.53 mi2.42 mi21553+2158355+1228355+12220765(Top 73%)7954(Top 65%)7954(Top 800%)
30K18.64 mi3.11 mi21345+2088273+828273+8220386(Top 72%)7872(Top 64%)7872(Top 792%)
20M20.00 mi1.36 mi21283+628263+108263+1020728(Top 73%)8209(Top 67%)8209(Top 826%)
21M21.00 mi1.00 mi21276+78266-38266-320800(Top 73%)8345(Top 68%)8345(Top 840%)
35K21.75 mi0.75 mi21201+758244+228244+2219738(Top 69%)7846(Top 64%)7846(Top 789%)
23M23.00 mi1.25 mi21109+928221+238221+2319972(Top 70%)8039(Top 66%)8039(Top 809%)
24M24.00 mi1.00 mi21060+498224-38224-320008(Top 70%)8090(Top 66%)8090(Top 814%)
40K24.85 mi0.85 mi20997+638204+208204+2019374(Top 68%)7826(Top 64%)7826(Top 787%)
25.2M25.20 mi0.35 mi20994+38205-18205-121300(Top 75%)8810(Top 72%)8810(Top 886%)
Finish26.22 mi1.02 mi20944+508198+78198+719797(Top 70%)8036(Top 66%)8036(Top 808%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21827

Females

8450

F55-59

8450

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

22487

Females

8856

F55-59

8856

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21827

Females

8450

F55-59

8450

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

21577

Females

8357

F55-59

8357

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

21994

Females

8599

F55-59

8599

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

20765

Females

7954

F55-59

7954

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20386

Females

7872

F55-59

7872

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

20728

Females

8209

F55-59

8209

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20800

Females

8345

F55-59

8345

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

19738

Females

7846

F55-59

7846

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

19972

Females

8039

F55-59

8039

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

20008

Females

8090

F55-59

8090

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19374

Females

7826

F55-59

7826

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21300

Females

8810

F55-59

8810

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19797

Females

8036

F55-59

8036

Passing Analysis

Category:
Athletes Passed
1825
Passed By
1564
Net Change
+261
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21205
5K → 10K78750-672#21205#21877
10K → 15K223185+38#21877#21839
15K → 20K231146+85#21839#21754
20K → Half3145-14#21754#21768
Half → 25K25641+215#21768#21553
25K → 30K30294+208#21553#21345
30K → 20M12765+62#21345#21283
20M → 21M8780+7#21283#21276
21M → 35K9217+75#21276#21201
35K → 23M13543+92#21201#21109
23M → 24M8637+49#21109#21060
24M → 40K7815+63#21060#20997
40K → 25.2M2724+3#20997#20994
25.2M → Finish7222+50#20994#20944
TOTALS18251564+261
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing