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BOSTON MARATHON 2025

Yen-Chi Chen

Bib: 21605 F TW

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 45%
Masters (Masters Women)
#0 / 6759
Top 33%
Division (F45-49)
#0 / 1813
Top 40%
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
8:08/mi
25:16
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:53/mi
49:44
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:56/mi
1:14:24
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:11/mi
1:39:48
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:56/mi
1:45:13
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:19/mi
2:05:24
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:41/mi
2:32:22
↑ 181↓ 1480.2%
138 ft elev
20M
8:48/mi
2:44:20
↑ 64↓ 500.2%
148 ft elev
21M
9:36/mi
2:53:56
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:39/mi
3:00:24
↑ 17↓ 861.7%
156 ft elev
23M
9:00/mi
3:11:40
↑ 23↓ 630.6%
116 ft elev
24M
8:59/mi
3:20:39
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:13/mi
3:28:32
↓ 200.3%
20 ft elev
25.2M
10:00/mi
3:31:59
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:12/mi
3:41:22
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:13
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time1:56:09
Pace8:52 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:5725:168:0825:16
8:08
-
10K
6.21 mi11:45:2549:448:0024:28
7:53
-0:15
15K
9.32 mi12:10:051:14:247:5924:40
7:56
+0:03
20K
12.43 mi12:35:291:39:488:0225:24
8:11
+0:15
Half
13.11 mi12:40:541:45:138:025:25
7:56
-0:15
25K
15.53 mi13:01:052:05:248:0420:11
8:19
+0:23
30K
18.64 mi13:28:032:32:228:1026:58
8:41
+0:22
20M
20.00 mi13:40:012:44:208:1311:58
8:48
+0:07
21M
21.00 mi13:49:372:53:568:179:36
9:36
+0:48
35K
21.75 mi13:56:053:00:248:186:28
8:39
-0:57
23M
23.00 mi14:07:213:11:408:2011:16
9:00
+0:21
24M
24.00 mi14:16:203:20:398:228:59
8:59
-0:01
40K
24.85 mi14:24:133:28:328:237:53
9:13
+0:14
25.2M
25.20 mi14:27:403:31:598:253:27
10:00
+0:47
Finish
26.22 mi14:37:033:41:228:279:23
9:12
-0:48

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

7:53 /mi

Average Pace

8:27 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:24

57% of race

Time at Steady Pace

54:23

25% of race

Time at Slower Pace

41:35

19% 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 mi11:20:5725:168:0825:16
8:08
#17605
10K
6.21 mi11:45:2549:448:0024:28
7:53
#16554
15K
9.32 mi12:10:051:14:247:5924:40
7:56
#16200
20K
12.43 mi12:35:291:39:488:0225:24
8:11
#16181
Half
13.11 mi12:40:541:45:138:025:25
7:56
#16145
25K
15.53 mi13:01:052:05:248:0420:11
8:19
#16116
30K
18.64 mi13:28:032:32:228:1026:58
8:41
#16034
20M
20.00 mi13:40:012:44:208:1311:58
8:48
#15975
21M
21.00 mi13:49:372:53:568:179:36
9:36
#15967
35K
21.75 mi13:56:053:00:248:186:28
8:39
#15945
23M
23.00 mi14:07:213:11:408:2011:16
9:00
#15913
24M
24.00 mi14:16:203:20:398:228:59
8:59
#15973
40K
24.85 mi14:24:133:28:328:237:53
9:13
#16015
25.2M
25.20 mi14:27:403:31:598:253:27
10:00
#16021
Finish
26.22 mi14:37:033:41:228:279:23
9:12
#16221
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi176056098609815593(Top 55%)4910(Top 40%)4910(Top 271%)
10K6.21 mi3.10 mi16554+10515473+6255473+62515500(Top 55%)4838(Top 40%)4838(Top 267%)
15K9.32 mi3.11 mi16200+3545252+2215252+22115593(Top 55%)4910(Top 40%)4910(Top 271%)
20K12.43 mi3.11 mi16181+195262-105262-1016156(Top 57%)5308(Top 43%)5308(Top 293%)
Half13.11 mi0.68 mi16145+365244+185244+1815515(Top 55%)4915(Top 40%)4915(Top 271%)
25K15.53 mi2.42 mi16116+295227+175227+1716091(Top 57%)5363(Top 44%)5363(Top 296%)
30K18.64 mi3.11 mi16034+825244-175244-1715886(Top 56%)5394(Top 44%)5394(Top 298%)
20M20.00 mi1.36 mi15975+595256-125256-1215719(Top 55%)5432(Top 44%)5432(Top 300%)
21M21.00 mi1.00 mi15967+85283-275283-2716566(Top 58%)6012(Top 49%)6012(Top 332%)
35K21.75 mi0.75 mi15945+225295-125295-1216354(Top 58%)5974(Top 49%)5974(Top 330%)
23M23.00 mi1.25 mi15913+325322-275322-2716254(Top 57%)6028(Top 49%)6028(Top 332%)
24M24.00 mi1.00 mi15973-605366-445366-4417293(Top 61%)6641(Top 54%)6641(Top 366%)
40K24.85 mi0.85 mi16015-425412-465412-4617457(Top 61%)6833(Top 56%)6833(Top 377%)
25.2M25.20 mi0.35 mi16021-65431-195431-1917083(Top 60%)6621(Top 54%)6621(Top 365%)
Finish26.22 mi1.02 mi16221-2005554-1235554-12319984(Top 70%)8132(Top 67%)8132(Top 449%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

15593

Females

4910

F45-49

4910

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

15500

Females

4838

F45-49

4838

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

15593

Females

4910

F45-49

4910

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16156

Females

5308

F45-49

5308

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

15515

Females

4915

F45-49

4915

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16091

Females

5363

F45-49

5363

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

15886

Females

5394

F45-49

5394

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15719

Females

5432

F45-49

5432

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

16566

Females

6012

F45-49

6012

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

16354

Females

5974

F45-49

5974

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16254

Females

6028

F45-49

6028

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

17293

Females

6641

F45-49

6641

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17457

Females

6833

F45-49

6833

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17083

Females

6621

F45-49

6621

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19984

Females

8132

F45-49

8132

Passing Analysis

Category:
Athletes Passed
2855
Passed By
1471
Net Change
+1384
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17605
5K → 10K110049+1051#17605#16554
10K → 15K41864+354#16554#16200
15K → 20K229210+19#16200#16181
20K → Half4711+36#16181#16145
Half → 25K178149+29#16145#16116
25K → 30K261179+82#16116#16034
30K → 20M14485+59#16034#15975
20M → 21M112104+8#15975#15967
21M → 35K8058+22#15967#15945
35K → 23M12492+32#15945#15913
23M → 24M49109-60#15913#15973
24M → 40K61103-42#15973#16015
40K → 25.2M2935-6#16015#16021
25.2M → Finish23223-200#16021#16221
TOTALS28551471+1384
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing