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BOSTON MARATHON 2025

Sylvie Alcaraz

Bib: 23407•F

QC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 46%
Masters (Masters Women)
#0 / 6759
Top 34%
Division (F50-54)
#0 / 1303
Top 27%
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
8:27/mi
26:15
↑ 97↓ 3451.5%
10K· 6.21 mi
8:30/mi
52:39
↑ 79↓ 1380.4%
15K· 9.32 mi
8:27/mi
1:18:55
↑ 67↓ 78
20K· 12.43 mi
8:28/mi
1:45:13
↑ 106↓ 860.1%
Half· 13.11 mi
8:29/mi
1:51:00
↑ 19↓ 370.5%
25K· 15.53 mi
8:32/mi
2:11:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:39/mi
2:38:36
↑ 181↓ 1480.2%
20M
8:37/mi
2:50:19
↑ 64↓ 500.2%
21M
8:50/mi
2:59:09
↑ 106↓ 241.6%
35K· 21.75 mi
8:23/mi
3:05:25
↑ 17↓ 861.7%
23M
8:30/mi
3:16:03
↑ 23↓ 630.6%
24M
8:18/mi
3:24:21
↓ 821.3%
40K· 24.85 mi
8:10/mi
3:31:20
↓ 200.3%
25.2M
8:42/mi
3:34:20
↑ 13↓ 160.2%
Finish· 26.22 mi
7:43/mi
3:42:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:51:00
Pace8:28 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:51:12
Pace8:29 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0226:158:2726:15
8:27
-
10K
6.21 mi11:49:2652:398:2826:24
8:30
+0:03
15K
9.32 mi12:15:421:18:558:2826:16
8:27
-0:03
20K
12.43 mi12:42:001:45:138:2826:18
8:28
+0:01
Half
13.11 mi12:47:471:51:008:285:47
8:29
+0:01
25K
15.53 mi13:08:292:11:428:2920:42
8:32
+0:03
30K
18.64 mi13:35:232:38:368:3026:54
8:39
+0:07
20M
20.00 mi13:47:062:50:198:3111:43
8:37
-0:02
21M
21.00 mi13:55:562:59:098:328:50
8:50
+0:13
35K
21.75 mi14:02:123:05:258:326:16
8:23
-0:27
23M
23.00 mi14:12:503:16:038:3110:38
8:30
+0:07
24M
24.00 mi14:21:083:24:218:318:18
8:18
-0:12
40K
24.85 mi14:28:073:31:208:306:59
8:10
-0:08
25.2M
25.20 mi14:31:073:34:208:303:00
8:42
+0:32
Finish
26.22 mi14:38:593:42:128:297:52
7:43
-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

7:43 /mi

Average Pace

8:29 /mi

Slowest Pace

8:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:54:01

51% of race

Time at Steady Pace

1:48:11

49% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:28 /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 mi11:23:0226:158:2726:15
8:27
#19595
10K
6.21 mi11:49:2652:398:2826:24
8:30
#19666
15K
9.32 mi12:15:421:18:558:2826:16
8:27
#19465
20K
12.43 mi12:42:001:45:138:2826:18
8:28
#19051
Half
13.11 mi12:47:471:51:008:285:47
8:29
#19047
25K
15.53 mi13:08:292:11:428:2920:42
8:32
#18784
30K
18.64 mi13:35:232:38:368:3026:54
8:39
#18183
20M
20.00 mi13:47:062:50:198:3111:43
8:37
#17880
21M
21.00 mi13:55:562:59:098:328:50
8:50
#17558
35K
21.75 mi14:02:123:05:258:326:16
8:23
#17449
23M
23.00 mi14:12:503:16:038:3110:38
8:30
#17176
24M
24.00 mi14:21:083:24:218:318:18
8:18
#16986
40K
24.85 mi14:28:073:31:208:306:59
8:10
#16757
25.2M
25.20 mi14:31:073:34:208:303:00
8:42
#16653
Finish
26.22 mi14:38:593:42:128:297:52
7:43
#16409
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi195957253725319058(Top 67%)6929(Top 57%)6929(Top 532%)
10K6.21 mi3.10 mi19666-717279-267279-2619784(Top 70%)7346(Top 60%)7346(Top 564%)
15K9.32 mi3.11 mi19465+2017162+1177162+11719058(Top 67%)6929(Top 57%)6929(Top 532%)
20K12.43 mi3.11 mi19051+4146934+2286934+22817990(Top 63%)6330(Top 52%)6330(Top 486%)
Half13.11 mi0.68 mi19047+46930+46930+419055(Top 67%)6914(Top 57%)6914(Top 531%)
25K15.53 mi2.42 mi18784+2636789+1416789+14117415(Top 61%)6090(Top 50%)6090(Top 467%)
30K18.64 mi3.11 mi18183+6016496+2936496+29315771(Top 56%)5327(Top 44%)5327(Top 409%)
20M20.00 mi1.36 mi17880+3036355+1416355+14114590(Top 51%)4831(Top 40%)4831(Top 371%)
21M21.00 mi1.00 mi17558+3226201+1546201+15412568(Top 44%)3915(Top 32%)3915(Top 300%)
35K21.75 mi0.75 mi17449+1096164+376164+3714768(Top 52%)5117(Top 42%)5117(Top 393%)
23M23.00 mi1.25 mi17176+2736037+1276037+12713302(Top 47%)4440(Top 36%)4440(Top 341%)
24M24.00 mi1.00 mi16986+1905947+905947+9013303(Top 47%)4478(Top 37%)4478(Top 344%)
40K24.85 mi0.85 mi16757+2295850+975850+9711420(Top 40%)3629(Top 30%)3629(Top 279%)
25.2M25.20 mi0.35 mi16653+1045794+565794+5610148(Top 36%)3135(Top 26%)3135(Top 241%)
Finish26.22 mi1.02 mi16409+2445674+1205674+12010899(Top 38%)3420(Top 28%)3420(Top 262%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

19058

Females

6929

F50-54

6929

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

19784

Females

7346

F50-54

7346

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

19058

Females

6929

F50-54

6929

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17990

Females

6330

F50-54

6330

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19055

Females

6914

F50-54

6914

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17415

Females

6090

F50-54

6090

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

15771

Females

5327

F50-54

5327

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

14590

Females

4831

F50-54

4831

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

12568

Females

3915

F50-54

3915

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14768

Females

5117

F50-54

5117

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13302

Females

4440

F50-54

4440

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

13303

Females

4478

F50-54

4478

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11420

Females

3629

F50-54

3629

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10148

Females

3135

F50-54

3135

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10899

Females

3420

F50-54

3420

Passing Analysis

Category:
Athletes Passed
3748
Passed By
562
Net Change
+3186
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19595
5K → 10K225296-71#19595#19666
10K → 15K301100+201#19666#19465
15K → 20K44834+414#19465#19051
20K → Half3430+4#19051#19047
Half → 25K29330+263#19047#18784
25K → 30K62019+601#18784#18183
30K → 20M3107+303#18183#17880
20M → 21M3231+322#17880#17558
21M → 35K12516+109#17558#17449
35K → 23M28512+273#17449#17176
23M → 24M1988+190#17176#16986
24M → 40K2323+229#16986#16757
40K → 25.2M1073+104#16757#16653
25.2M → Finish2473+244#16653#16409
TOTALS3748562+3186
📊

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