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BOSTON MARATHON 2025

Ellen Deng

Bib: 30317•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 36%
Division (F18-39)
#0 / 5469
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
8:30/mi
26:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:09/mi
51:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:05/mi
1:16:53
↑ 67↓ 78
20K· 12.43 mi
8:10/mi
1:42:15
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:47:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:12/mi
2:07:41
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:33:20
↑ 181↓ 1480.2%
20M
8:15/mi
2:44:32
↑ 64↓ 500.2%
21M
8:24/mi
2:52:56
↑ 106↓ 241.6%
35K· 21.75 mi
7:56/mi
2:58:52
↑ 17↓ 861.7%
23M
8:06/mi
3:09:01
↑ 23↓ 630.6%
24M
7:47/mi
3:16:48
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:23:30
↓ 200.3%
25.2M
8:22/mi
3:26:23
↑ 13↓ 160.2%
Finish· 26.22 mi
7:21/mi
3:33:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:47:49
Pace8:13 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:03
Pace8:05 /mi
📊Negative Split: 1.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:3926:268:3026:26
8:30
-
10K
6.21 mi12:09:5951:468:2025:20
8:09
-0:21
15K
9.32 mi12:35:061:16:538:1525:07
8:05
-0:04
20K
12.43 mi13:00:281:42:158:1425:22
8:10
+0:05
Half
13.11 mi13:06:021:47:498:135:34
8:10
0:00
25K
15.53 mi13:25:542:07:418:1319:52
8:12
+0:02
30K
18.64 mi13:51:332:33:208:1425:39
8:15
+0:03
20M
20.00 mi14:02:452:44:328:1411:12
8:15
0:00
21M
21.00 mi14:11:092:52:568:148:24
8:24
+0:09
35K
21.75 mi14:17:052:58:528:135:56
7:56
-0:28
23M
23.00 mi14:27:143:09:018:1310:09
8:06
+0:10
24M
24.00 mi14:35:013:16:488:127:47
7:47
-0:19
40K
24.85 mi14:41:433:23:308:116:42
7:50
+0:03
25.2M
25.20 mi14:44:363:26:238:112:53
8:22
+0:32
Finish
26.22 mi14:52:053:33:528:107:29
7:21
-1:01

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

7:21 /mi

Average Pace

8:10 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

53:01

25% of race

Time at Steady Pace

2:40:51

75% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:09 /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 mi11:44:3926:268:3026:26
8:30
#19927
10K
6.21 mi12:09:5951:468:2025:20
8:09
#18814
15K
9.32 mi12:35:061:16:538:1525:07
8:05
#18092
20K
12.43 mi13:00:281:42:158:1425:22
8:10
#17532
Half
13.11 mi13:06:021:47:498:135:34
8:10
#17495
25K
15.53 mi13:25:542:07:418:1319:52
8:12
#17068
30K
18.64 mi13:51:332:33:208:1425:39
8:15
#16378
20M
20.00 mi14:02:452:44:328:1411:12
8:15
#16056
21M
21.00 mi14:11:092:52:568:148:24
8:24
#15648
35K
21.75 mi14:17:052:58:528:135:56
7:56
#15494
23M
23.00 mi14:27:143:09:018:1310:09
8:06
#15160
24M
24.00 mi14:35:013:16:488:127:47
7:47
#14885
40K
24.85 mi14:41:433:23:308:116:42
7:50
#14644
25.2M
25.20 mi14:44:363:26:238:112:53
8:22
#14534
Finish
26.22 mi14:52:053:33:528:107:29
7:21
#14249
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi199277454745416641(Top 59%)5521(Top 45%)5521(Top 101%)
10K6.21 mi3.10 mi18814+11136799+6556799+65517575(Top 62%)6044(Top 49%)6044(Top 111%)
15K9.32 mi3.11 mi18092+7226383+4166383+41616641(Top 59%)5521(Top 45%)5521(Top 101%)
20K12.43 mi3.11 mi17532+5606053+3306053+33016086(Top 57%)5266(Top 43%)5266(Top 96%)
Half13.11 mi0.68 mi17495+376033+206033+2017026(Top 60%)5764(Top 47%)5764(Top 105%)
25K15.53 mi2.42 mi17068+4275806+2275806+22715285(Top 54%)4887(Top 40%)4887(Top 89%)
30K18.64 mi3.11 mi16378+6905459+3475459+34713215(Top 47%)3953(Top 32%)3953(Top 72%)
20M20.00 mi1.36 mi16056+3225298+1615298+16112120(Top 43%)3524(Top 29%)3524(Top 64%)
21M21.00 mi1.00 mi15648+4085104+1945104+1949898(Top 35%)2582(Top 21%)2582(Top 47%)
35K21.75 mi0.75 mi15494+1545024+805024+8011838(Top 42%)3577(Top 29%)3577(Top 65%)
23M23.00 mi1.25 mi15160+3344861+1634861+16310831(Top 38%)3154(Top 26%)3154(Top 58%)
24M24.00 mi1.00 mi14885+2754739+1224739+1229744(Top 34%)2698(Top 22%)2698(Top 49%)
40K24.85 mi0.85 mi14644+2414624+1154624+1159098(Top 32%)2519(Top 21%)2519(Top 46%)
25.2M25.20 mi0.35 mi14534+1104583+414583+418089(Top 28%)2147(Top 18%)2147(Top 39%)
Finish26.22 mi1.02 mi14249+2854452+1314452+1318129(Top 29%)2137(Top 17%)2137(Top 39%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

16641

Females

5521

F18-39

5521

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

17575

Females

6044

F18-39

6044

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

16641

Females

5521

F18-39

5521

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16086

Females

5266

F18-39

5266

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17026

Females

5764

F18-39

5764

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

15285

Females

4887

F18-39

4887

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13215

Females

3953

F18-39

3953

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12120

Females

3524

F18-39

3524

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9898

Females

2582

F18-39

2582

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11838

Females

3577

F18-39

3577

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10831

Females

3154

F18-39

3154

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9744

Females

2698

F18-39

2698

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

9098

Females

2519

F18-39

2519

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

8089

Females

2147

F18-39

2147

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

8129

Females

2137

F18-39

2137

Passing Analysis

Category:
Athletes Passed
5790
Passed By
112
Net Change
+5678
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19927
5K → 10K114128+1113#19927#18814
10K → 15K73917+722#18814#18092
15K → 20K57818+560#18092#17532
20K → Half5114+37#17532#17495
Half → 25K44316+427#17495#17068
25K → 30K6977+690#17068#16378
30K → 20M3253+322#16378#16056
20M → 21M4091+408#16056#15648
21M → 35K1573+154#15648#15494
35K → 23M3362+334#15494#15160
23M → 24M2772+275#15160#14885
24M → 40K2421+241#14885#14644
40K → 25.2M1100+110#14644#14534
25.2M → Finish2850+285#14534#14249
TOTALS5790112+5678
📊

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