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BOSTON MARATHON 2025

Stacy Ferguson

Bib: 18623•F

OH

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 50%
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
8:08/mi
25:17
↑ 97↓ 3451.5%
10K· 6.21 mi
8:18/mi
51:04
↑ 79↓ 1380.4%
15K· 9.32 mi
8:13/mi
1:16:37
↑ 67↓ 78
20K· 12.43 mi
8:10/mi
1:42:00
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:47:24
↑ 19↓ 370.5%
25K· 15.53 mi
8:10/mi
2:07:13
↑ 66↓ 880.2%
30K· 18.64 mi
8:18/mi
2:32:59
↑ 181↓ 1480.2%
20M
8:12/mi
2:44:08
↑ 64↓ 500.2%
21M
8:39/mi
2:52:47
↑ 106↓ 241.6%
35K· 21.75 mi
7:49/mi
2:58:38
↑ 17↓ 861.7%
23M
8:01/mi
3:08:40
↑ 23↓ 630.6%
24M
7:41/mi
3:16:21
↓ 821.3%
40K· 24.85 mi
7:49/mi
3:23:02
↓ 200.3%
25.2M
8:25/mi
3:25:56
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:33:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:47:24
Pace8:12 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:06
Pace8:06 /mi
📊Negative Split: 1.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1925:178:0825:17
8:08
-
10K
6.21 mi11:45:0651:048:1325:47
8:18
+0:10
15K
9.32 mi12:10:391:16:378:1325:33
8:13
-0:05
20K
12.43 mi12:36:021:42:008:1225:23
8:10
-0:03
Half
13.11 mi12:41:261:47:248:125:24
7:55
-0:15
25K
15.53 mi13:01:152:07:138:1119:49
8:10
+0:15
30K
18.64 mi13:27:012:32:598:1225:46
8:18
+0:08
20M
20.00 mi13:38:102:44:088:1211:09
8:12
-0:06
21M
21.00 mi13:46:492:52:478:148:39
8:39
+0:27
35K
21.75 mi13:52:402:58:388:135:51
7:49
-0:50
23M
23.00 mi14:02:423:08:408:1210:02
8:01
+0:12
24M
24.00 mi14:10:233:16:218:117:41
7:41
-0:20
40K
24.85 mi14:17:043:23:028:106:41
7:49
+0:08
25.2M
25.20 mi14:19:583:25:568:102:54
8:25
+0:36
Finish
26.22 mi14:27:323:33:308:097:34
7:26
-0:59

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

7:26 /mi

Average Pace

8:09 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:42

53% of race

Time at Steady Pace

1:39:48

47% 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 mi11:19:1925:178:0825:17
8:08
#17644
10K
6.21 mi11:45:0651:048:1325:47
8:18
#18098
15K
9.32 mi12:10:391:16:378:1325:33
8:13
#17886
20K
12.43 mi12:36:021:42:008:1225:23
8:10
#17392
Half
13.11 mi12:41:261:47:248:125:24
7:55
#17277
25K
15.53 mi13:01:152:07:138:1119:49
8:10
#16893
30K
18.64 mi13:27:012:32:598:1225:46
8:18
#16256
20M
20.00 mi13:38:102:44:088:1211:09
8:12
#15912
21M
21.00 mi13:46:492:52:478:148:39
8:39
#15598
35K
21.75 mi13:52:402:58:388:135:51
7:49
#15411
23M
23.00 mi14:02:423:08:408:1210:02
8:01
#15052
24M
24.00 mi14:10:233:16:218:117:41
7:41
#14760
40K
24.85 mi14:17:043:23:028:106:41
7:49
#14512
25.2M
25.20 mi14:19:583:25:568:102:54
8:25
#14404
Finish
26.22 mi14:27:323:33:308:097:34
7:26
#14169
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi176446116611617548(Top 62%)6040(Top 49%)6040(Top 110%)
10K6.21 mi3.10 mi18098-4546388-2726388-27218550(Top 65%)6619(Top 54%)6619(Top 121%)
15K9.32 mi3.11 mi17886+2126257+1316257+13117548(Top 62%)6040(Top 49%)6040(Top 110%)
20K12.43 mi3.11 mi17392+4945970+2875970+28716113(Top 57%)5278(Top 43%)5278(Top 97%)
Half13.11 mi0.68 mi17277+1155913+575913+5715258(Top 54%)4755(Top 39%)4755(Top 87%)
25K15.53 mi2.42 mi16893+3845700+2135700+21315130(Top 53%)4802(Top 39%)4802(Top 88%)
30K18.64 mi3.11 mi16256+6375381+3195381+31913470(Top 47%)4095(Top 33%)4095(Top 75%)
20M20.00 mi1.36 mi15912+3445215+1665215+16611864(Top 42%)3382(Top 28%)3382(Top 62%)
21M21.00 mi1.00 mi15598+3145076+1395076+13911417(Top 40%)3318(Top 27%)3318(Top 61%)
35K21.75 mi0.75 mi15411+1874981+954981+9511050(Top 39%)3148(Top 26%)3148(Top 58%)
23M23.00 mi1.25 mi15052+3594796+1854796+18510173(Top 36%)2840(Top 23%)2840(Top 52%)
24M24.00 mi1.00 mi14760+2924665+1314665+1319059(Top 32%)2367(Top 19%)2367(Top 43%)
40K24.85 mi0.85 mi14512+2484554+1114554+1118953(Top 32%)2450(Top 20%)2450(Top 45%)
25.2M25.20 mi0.35 mi14404+1084506+484506+488398(Top 30%)2278(Top 19%)2278(Top 42%)
Finish26.22 mi1.02 mi14169+2354403+1034403+1038723(Top 31%)2414(Top 20%)2414(Top 44%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

17548

Females

6040

F18-39

6040

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

18550

Females

6619

F18-39

6619

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

17548

Females

6040

F18-39

6040

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16113

Females

5278

F18-39

5278

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

15258

Females

4755

F18-39

4755

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

15130

Females

4802

F18-39

4802

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13470

Females

4095

F18-39

4095

30K→20M

18.6 - 20.0 mi

Top 42%
×5story building
+64ft-50ft

Overall

11864

Females

3382

F18-39

3382

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

11417

Females

3318

F18-39

3318

21M→35K

21.0 - 21.8 mi

Top 39%
×7story building
+17ft-86ft

Overall

11050

Females

3148

F18-39

3148

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

10173

Females

2840

F18-39

2840

23M→24M

23.0 - 24.0 mi

Top 32%
×6story building
+12ft-82ft

Overall

9059

Females

2367

F18-39

2367

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8953

Females

2450

F18-39

2450

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8398

Females

2278

F18-39

2278

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8723

Females

2414

F18-39

2414

Passing Analysis

Category:
Athletes Passed
4228
Passed By
753
Net Change
+3475
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17644
5K → 10K130584-454#17644#18098
10K → 15K30593+212#18098#17886
15K → 20K51420+494#17886#17392
20K → Half1172+115#17392#17277
Half → 25K39915+384#17277#16893
25K → 30K65215+637#16893#16256
30K → 20M3462+344#16256#15912
20M → 21M32612+314#15912#15598
21M → 35K1892+187#15598#15411
35K → 23M3612+359#15411#15052
23M → 24M2931+292#15052#14760
24M → 40K2480+248#14760#14512
40K → 25.2M1102+108#14512#14404
25.2M → Finish2383+235#14404#14169
TOTALS4228753+3475
📊

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