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BOSTON MARATHON 2025

Shelley Chanas

Bib: 21181•F

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
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
8:11/mi
25:24
↑ 97↓ 3451.5%
10K· 6.21 mi
8:40/mi
52:20
↑ 79↓ 1380.4%
15K· 9.32 mi
8:37/mi
1:19:06
↑ 67↓ 78
20K· 12.43 mi
8:53/mi
1:46:42
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:52:32
↑ 19↓ 370.5%
25K· 15.53 mi
10:15/mi
2:17:23
↑ 66↓ 880.2%
30K· 18.64 mi
10:03/mi
2:48:36
↑ 181↓ 1480.2%
20M
9:24/mi
3:01:23
↑ 64↓ 500.2%
21M
10:37/mi
3:12:00
↑ 106↓ 241.6%
35K· 21.75 mi
9:28/mi
3:19:05
↑ 17↓ 861.7%
23M
9:08/mi
3:30:31
↑ 23↓ 630.6%
24M
9:40/mi
3:40:11
↓ 821.3%
40K· 24.85 mi
9:25/mi
3:48:14
↓ 200.3%
25.2M
9:57/mi
3:51:40
↑ 13↓ 160.2%
Finish· 26.22 mi
8:48/mi
4:00:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:32
Pace8:35 /mi
2nd Half
Distance13.11 mi
Time2:08:06
Pace9:46 /mi
📊Positive Split: 13.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:2325:248:1125:24
8:11
-
10K
6.21 mi11:46:1952:208:2526:56
8:40
+0:29
15K
9.32 mi12:13:051:19:068:2926:46
8:37
-0:03
20K
12.43 mi12:40:411:46:428:3527:36
8:53
+0:16
Half
13.11 mi12:46:311:52:328:355:50
8:33
-0:20
25K
15.53 mi13:11:222:17:238:5124:51
10:15
+1:42
30K
18.64 mi13:42:352:48:369:0331:13
10:03
-0:12
20M
20.00 mi13:55:223:01:239:0412:47
9:24
-0:39
21M
21.00 mi14:05:593:12:009:0910:37
10:37
+1:13
35K
21.75 mi14:13:043:19:059:097:05
9:28
-1:09
23M
23.00 mi14:24:303:30:319:0911:26
9:08
-0:20
24M
24.00 mi14:34:103:40:119:109:40
9:40
+0:32
40K
24.85 mi14:42:133:48:149:118:03
9:25
-0:15
25.2M
25.20 mi14:45:393:51:409:123:26
9:57
+0:32
Finish
26.22 mi14:54:374:00:389:118:58
8:48
-1:09

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

8:11 /mi

Average Pace

9:11 /mi

Slowest Pace

10:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:30

50% of race

Time at Steady Pace

49:01

20% of race

Time at Slower Pace

1:10:07

29% of race

Average Pace: 9:11 /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 mi11:19:2325:248:1125:24
8:11
#17965
10K
6.21 mi11:46:1952:208:2526:56
8:40
#19385
15K
9.32 mi12:13:051:19:068:2926:46
8:37
#19582
20K
12.43 mi12:40:411:46:428:3527:36
8:53
#19800
Half
13.11 mi12:46:311:52:328:355:50
8:33
#19787
25K
15.53 mi13:11:222:17:238:5124:51
10:15
#20841
30K
18.64 mi13:42:352:48:369:0331:13
10:03
#21083
20M
20.00 mi13:55:223:01:239:0412:47
9:24
#20887
21M
21.00 mi14:05:593:12:009:0910:37
10:37
#20843
35K
21.75 mi14:13:043:19:059:097:05
9:28
#20824
23M
23.00 mi14:24:303:30:319:0911:26
9:08
#20612
24M
24.00 mi14:34:103:40:119:109:40
9:40
#20610
40K
24.85 mi14:42:133:48:149:118:03
9:25
#20546
25.2M
25.20 mi14:45:393:51:409:123:26
9:57
#20508
Finish
26.22 mi14:54:374:00:389:118:58
8:48
#20446
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi179656327632720015(Top 70%)7448(Top 61%)7448(Top 572%)
10K6.21 mi3.10 mi19385-14207112-7857112-78520715(Top 73%)7870(Top 64%)7870(Top 604%)
15K9.32 mi3.11 mi19582-1977224-1127224-11220015(Top 70%)7448(Top 61%)7448(Top 572%)
20K12.43 mi3.11 mi19800-2187364-1407364-14020390(Top 72%)7705(Top 63%)7705(Top 591%)
Half13.11 mi0.68 mi19787+137355+97355+919589(Top 69%)7245(Top 59%)7245(Top 556%)
25K15.53 mi2.42 mi20841-10547953-5987953-59823830(Top 84%)9650(Top 79%)9650(Top 741%)
30K18.64 mi3.11 mi21083-2428131-1788131-17821731(Top 77%)8629(Top 71%)8629(Top 662%)
20M20.00 mi1.36 mi20887+1968034+978034+9718797(Top 66%)7164(Top 59%)7164(Top 550%)
21M21.00 mi1.00 mi20843+448036-28036-220362(Top 72%)8108(Top 66%)8108(Top 622%)
35K21.75 mi0.75 mi20824+198044-88044-820244(Top 71%)8102(Top 66%)8102(Top 622%)
23M23.00 mi1.25 mi20612+2127946+987946+9817037(Top 60%)6480(Top 53%)6480(Top 497%)
24M24.00 mi1.00 mi20610+27968-227968-2220288(Top 71%)8235(Top 67%)8235(Top 632%)
40K24.85 mi0.85 mi20546+647948+207948+2018383(Top 65%)7332(Top 60%)7332(Top 563%)
25.2M25.20 mi0.35 mi20508+387933+157933+1516919(Top 60%)6573(Top 54%)6573(Top 504%)
Finish26.22 mi1.02 mi20446+627915+187915+1818077(Top 64%)7134(Top 58%)7134(Top 548%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

20015

Females

7448

F50-54

7448

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

20715

Females

7870

F50-54

7870

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

20015

Females

7448

F50-54

7448

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

20390

Females

7705

F50-54

7705

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

19589

Females

7245

F50-54

7245

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

23830

Females

9650

F50-54

9650

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21731

Females

8629

F50-54

8629

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18797

Females

7164

F50-54

7164

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

20362

Females

8108

F50-54

8108

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20244

Females

8102

F50-54

8102

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

17037

Females

6480

F50-54

6480

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

20288

Females

8235

F50-54

8235

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18383

Females

7332

F50-54

7332

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

16919

Females

6573

F50-54

6573

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18077

Females

7134

F50-54

7134

Passing Analysis

Category:
Athletes Passed
1372
Passed By
3853
Net Change
-2481
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17965
5K → 10K281448-1420#17965#19385
10K → 15K128325-197#19385#19582
15K → 20K134352-218#19582#19800
20K → Half3926+13#19800#19787
Half → 25K191073-1054#19787#20841
25K → 30K139381-242#20841#21083
30K → 20M20812+196#21083#20887
20M → 21M11167+44#20887#20843
21M → 35K6142+19#20843#20824
35K → 23M2208+212#20824#20612
23M → 24M6462+2#20612#20610
24M → 40K8622+64#20610#20546
40K → 25.2M4810+38#20546#20508
25.2M → Finish8725+62#20508#20446
TOTALS13723853-2481
📊

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