Boston Marathon logo
BOSTON MARATHON 2025

Chunguang Li

MO

Bib: 24996 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 (F60-64)
#0 / 624
Top 41%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:10/mi
28:30
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:11/mi
57:03
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:10/mi
1:25:31
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:16/mi
1:54:17
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:02/mi
2:00:27
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:17/mi
2:22:57
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:40/mi
2:52:58
↑ 181↓ 1480.2%
138 ft elev
20M
10:02/mi
3:06:36
↑ 64↓ 500.2%
148 ft elev
21M
11:01/mi
3:17:37
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:29/mi
3:24:43
↑ 17↓ 861.7%
156 ft elev
23M
10:05/mi
3:37:20
↑ 23↓ 630.6%
116 ft elev
24M
9:48/mi
3:47:08
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:25/mi
3:56:02
↓ 200.3%
20 ft elev
25.2M
11:27/mi
3:59:59
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:38/mi
4:09:48
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Is this your race?

Claim it for a free AI report on this race

A one-of-a-kind AI Race Performance Report that reads your race like a coach. A plain-English story of how you raced, where you surged and faded, and what it all means. Emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:27
Pace9:11 /mi
2nd Half
Distance13.11 mi
Time2:09:21
Pace9:52 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:2328:309:1028:30
9:10
-
10K
6.21 mi11:56:5657:039:1128:33
9:11
+0:01
15K
9.32 mi12:25:241:25:319:1128:28
9:10
-0:01
20K
12.43 mi12:54:101:54:179:1228:46
9:16
+0:06
Half
13.11 mi13:00:202:00:279:116:10
9:02
-0:14
25K
15.53 mi13:22:502:22:579:1222:30
9:17
+0:15
30K
18.64 mi13:52:512:52:589:1730:01
9:40
+0:23
20M
20.00 mi14:06:293:06:369:2013:38
10:02
+0:22
21M
21.00 mi14:17:303:17:379:2511:01
11:01
+0:59
35K
21.75 mi14:24:363:24:439:257:06
9:29
-1:32
23M
23.00 mi14:37:133:37:209:2712:37
10:05
+0:36
24M
24.00 mi14:47:013:47:089:289:48
9:48
-0:17
40K
24.85 mi14:55:553:56:029:308:54
10:25
+0:37
25.2M
25.20 mi14:59:523:59:599:313:57
11:27
+1:02
Finish
26.22 mi15:09:414:09:489:329:49
9:38
-1:49

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

9:02 /mi

Average Pace

9:32 /mi

Slowest Pace

11:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:22:57

57% of race

Time at Steady Pace

56:44

23% of race

Time at Slower Pace

50:07

20% of race

Average Pace: 9:32 /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 mi11:28:2328:309:1028:30
9:10
#23130
10K
6.21 mi11:56:5657:039:1128:33
9:11
#23147
15K
9.32 mi12:25:241:25:319:1128:28
9:10
#22996
20K
12.43 mi12:54:101:54:179:1228:46
9:16
#22774
Half
13.11 mi13:00:202:00:279:116:10
9:02
#22729
25K
15.53 mi13:22:502:22:579:1222:30
9:17
#22444
30K
18.64 mi13:52:512:52:589:1730:01
9:40
#22085
20M
20.00 mi14:06:293:06:369:2013:38
10:02
#21997
21M
21.00 mi14:17:303:17:379:2511:01
11:01
#21945
35K
21.75 mi14:24:363:24:439:257:06
9:29
#21879
23M
23.00 mi14:37:133:37:209:2712:37
10:05
#21790
24M
24.00 mi14:47:013:47:089:289:48
9:48
#21751
40K
24.85 mi14:55:553:56:029:308:54
10:25
#21737
25.2M
25.20 mi14:59:523:59:599:313:57
11:27
#21732
Finish
26.22 mi15:09:414:09:489:329:49
9:38
#21710
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi231309240924022728(Top 80%)8961(Top 73%)8961(Top 1436%)
10K6.21 mi3.10 mi23147-179227+139227+1323155(Top 82%)9214(Top 75%)9214(Top 1477%)
15K9.32 mi3.11 mi22996+1519123+1049123+10422728(Top 80%)8961(Top 73%)8961(Top 1436%)
20K12.43 mi3.11 mi22774+2228994+1298994+12922139(Top 78%)8664(Top 71%)8664(Top 1388%)
Half13.11 mi0.68 mi22729+458971+238971+2322009(Top 77%)8614(Top 70%)8614(Top 1380%)
25K15.53 mi2.42 mi22444+2858835+1368835+13621110(Top 74%)8159(Top 67%)8159(Top 1308%)
30K18.64 mi3.11 mi22085+3598668+1678668+16720584(Top 72%)7983(Top 65%)7983(Top 1279%)
20M20.00 mi1.36 mi21997+888636+328636+3221080(Top 74%)8403(Top 69%)8403(Top 1347%)
21M21.00 mi1.00 mi21945+528636863621461(Top 76%)8688(Top 71%)8688(Top 1392%)
35K21.75 mi0.75 mi21879+668608+288608+2820329(Top 72%)8153(Top 67%)8153(Top 1307%)
23M23.00 mi1.25 mi21790+898602+68602+620745(Top 73%)8429(Top 69%)8429(Top 1351%)
24M24.00 mi1.00 mi21751+398602860220735(Top 73%)8466(Top 69%)8466(Top 1357%)
40K24.85 mi0.85 mi21737+148619-178619-1721679(Top 76%)9029(Top 74%)9029(Top 1447%)
25.2M25.20 mi0.35 mi21732+58622-38622-321960(Top 77%)9132(Top 75%)9132(Top 1463%)
Finish26.22 mi1.02 mi21710+228620+28620+221682(Top 76%)9006(Top 74%)9006(Top 1443%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

22728

Females

8961

F60-64

8961

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

23155

Females

9214

F60-64

9214

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

22728

Females

8961

F60-64

8961

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

22139

Females

8664

F60-64

8664

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

22009

Females

8614

F60-64

8614

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

21110

Females

8159

F60-64

8159

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20584

Females

7983

F60-64

7983

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

21080

Females

8403

F60-64

8403

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

21461

Females

8688

F60-64

8688

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

20329

Females

8153

F60-64

8153

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20745

Females

8429

F60-64

8429

23M→24M

23.0 - 24.0 mi

Top 73%
×6story building
+12ft-82ft

Overall

20735

Females

8466

F60-64

8466

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21679

Females

9029

F60-64

9029

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21960

Females

9132

F60-64

9132

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

21682

Females

9006

F60-64

9006

Passing Analysis

Category:
Athletes Passed
2163
Passed By
743
Net Change
+1420
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23130
5K → 10K213230-17#23130#23147
10K → 15K24695+151#23147#22996
15K → 20K30381+222#22996#22774
20K → Half5510+45#22774#22729
Half → 25K31025+285#22729#22444
25K → 30K39536+359#22444#22085
30K → 20M13244+88#22085#21997
20M → 21M10452+52#21997#21945
21M → 35K7812+66#21945#21879
35K → 23M12334+89#21879#21790
23M → 24M6728+39#21790#21751
24M → 40K5945+14#21751#21737
40K → 25.2M2116+5#21737#21732
25.2M → Finish5735+22#21732#21710
TOTALS2163743+1420
📊

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