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BOSTON MARATHON 2025

Adelina Smirnova

Bib: 12235•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 20%
Masters (Masters Women)
#0 / 6759
Top 8%
Division (F45-49)
#0 / 1813
Top 9%
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
7:08/mi
22:10
↑ 97↓ 3451.5%
10K· 6.21 mi
7:14/mi
44:38
↑ 79↓ 1380.4%
15K· 9.32 mi
7:15/mi
1:07:09
↑ 67↓ 78
20K· 12.43 mi
7:26/mi
1:30:14
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:35:16
↑ 19↓ 370.5%
25K· 15.53 mi
8:23/mi
1:55:35
↑ 66↓ 880.2%
30K· 18.64 mi
7:54/mi
2:20:09
↑ 181↓ 1480.2%
20M
8:00/mi
2:31:01
↑ 64↓ 500.2%
21M
8:32/mi
2:39:33
↑ 106↓ 241.6%
35K· 21.75 mi
7:44/mi
2:45:20
↑ 17↓ 861.7%
23M
8:01/mi
2:55:22
↑ 23↓ 630.6%
24M
7:52/mi
3:03:14
↓ 821.3%
40K· 24.85 mi
8:03/mi
3:10:07
↓ 200.3%
25.2M
8:42/mi
3:13:07
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:20:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:16
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time1:45:26
Pace8:03 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:2722:107:0822:10
7:08
-
10K
6.21 mi11:12:5544:387:1122:28
7:14
+0:06
15K
9.32 mi11:35:261:07:097:1222:31
7:15
+0:01
20K
12.43 mi11:58:311:30:147:1623:05
7:26
+0:11
Half
13.11 mi12:03:331:35:167:165:02
7:23
-0:03
25K
15.53 mi12:23:521:55:357:2620:19
8:23
+1:00
30K
18.64 mi12:48:262:20:097:3124:34
7:54
-0:29
20M
20.00 mi12:59:182:31:017:3310:52
8:00
+0:06
21M
21.00 mi13:07:502:39:337:368:32
8:32
+0:32
35K
21.75 mi13:13:372:45:207:365:47
7:44
-0:48
23M
23.00 mi13:23:392:55:227:3710:02
8:01
+0:17
24M
24.00 mi13:31:313:03:147:387:52
7:52
-0:09
40K
24.85 mi13:38:243:10:077:396:53
8:03
+0:11
25.2M
25.20 mi13:41:243:13:077:403:00
8:42
+0:39
Finish
26.22 mi13:48:593:20:427:407:35
7:26
-1:16

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

7:08 /mi

Average Pace

7:40 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:51

51% of race

Time at Steady Pace

1:06:00

33% of race

Time at Slower Pace

31:51

16% of race

Average Pace: 7:39 /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 mi10:50:2722:107:0822:10
7:08
#8940
10K
6.21 mi11:12:5544:387:1122:28
7:14
#9317
15K
9.32 mi11:35:261:07:097:1222:31
7:15
#9377
20K
12.43 mi11:58:311:30:147:1623:05
7:26
#9513
Half
13.11 mi12:03:331:35:167:165:02
7:23
#9573
25K
15.53 mi12:23:521:55:357:2620:19
8:23
#10814
30K
18.64 mi12:48:262:20:097:3124:34
7:54
#10746
20M
20.00 mi12:59:182:31:017:3310:52
8:00
#10703
21M
21.00 mi13:07:502:39:337:368:32
8:32
#10661
35K
21.75 mi13:13:372:45:207:365:47
7:44
#10627
23M
23.00 mi13:23:392:55:227:3710:02
8:01
#10546
24M
24.00 mi13:31:313:03:147:387:52
7:52
#10507
40K
24.85 mi13:38:243:10:077:396:53
8:03
#10481
25.2M
25.20 mi13:41:243:13:077:403:00
8:42
#10450
Finish
26.22 mi13:48:593:20:427:407:35
7:26
#10348
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi8940134913499549(Top 34%)1677(Top 14%)1677(Top 92%)
10K6.21 mi3.10 mi9317-3771508-1591508-1599778(Top 34%)1732(Top 14%)1732(Top 96%)
15K9.32 mi3.11 mi9377-601551-431551-439549(Top 34%)1677(Top 14%)1677(Top 92%)
20K12.43 mi3.11 mi9513-1361648-971648-9710181(Top 36%)2048(Top 17%)2048(Top 113%)
Half13.11 mi0.68 mi9573-601684-361684-3610749(Top 38%)2314(Top 19%)2314(Top 128%)
25K15.53 mi2.42 mi10814-12412294-6102294-61016433(Top 58%)5544(Top 45%)5544(Top 306%)
30K18.64 mi3.11 mi10746+682336-422336-4210701(Top 38%)2643(Top 22%)2643(Top 146%)
20M20.00 mi1.36 mi10703+432358-222358-2210440(Top 37%)2654(Top 22%)2654(Top 146%)
21M21.00 mi1.00 mi10661+422374-162374-1610709(Top 38%)2957(Top 24%)2957(Top 163%)
35K21.75 mi0.75 mi10627+342373+12373+110333(Top 36%)2758(Top 23%)2758(Top 152%)
23M23.00 mi1.25 mi10546+812375-22375-210141(Top 36%)2808(Top 23%)2808(Top 155%)
24M24.00 mi1.00 mi10507+392387-122387-1210339(Top 36%)2961(Top 24%)2961(Top 163%)
40K24.85 mi0.85 mi10481+262403-162403-1610574(Top 37%)3198(Top 26%)3198(Top 176%)
25.2M25.20 mi0.35 mi10450+312408-52408-510048(Top 35%)3035(Top 25%)3035(Top 167%)
Finish26.22 mi1.02 mi10348+1022394+142394+148806(Top 31%)2444(Top 20%)2444(Top 135%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9549

Females

1677

F45-49

1677

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9778

Females

1732

F45-49

1732

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9549

Females

1677

F45-49

1677

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10181

Females

2048

F45-49

2048

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10749

Females

2314

F45-49

2314

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

16433

Females

5544

F45-49

5544

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10701

Females

2643

F45-49

2643

30K→20M

18.6 - 20.0 mi

Top 37%
×5story building
+64ft-50ft

Overall

10440

Females

2654

F45-49

2654

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10709

Females

2957

F45-49

2957

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

10333

Females

2758

F45-49

2758

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

10141

Females

2808

F45-49

2808

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

10339

Females

2961

F45-49

2961

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

10574

Females

3198

F45-49

3198

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

10048

Females

3035

F45-49

3035

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8806

Females

2444

F45-49

2444

Passing Analysis

Category:
Athletes Passed
1522
Passed By
2928
Net Change
-1408
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8940
5K → 10K107484-377#8940#9317
10K → 15K132192-60#9317#9377
15K → 20K146282-136#9377#9513
20K → Half1676-60#9513#9573
Half → 25K241263-1241#9573#10814
25K → 30K274206+68#10814#10746
30K → 20M13592+43#10746#10703
20M → 21M11775+42#10703#10661
21M → 35K7137+34#10661#10627
35K → 23M13655+81#10627#10546
23M → 24M9859+39#10546#10507
24M → 40K7650+26#10507#10481
40K → 25.2M5423+31#10481#10450
25.2M → Finish13634+102#10450#10348
TOTALS15222928-1408
📊

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