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BOSTON MARATHON 2025

Arissa Opalacz

MA

Bib: 11117 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 23%
Gender (Female)
#0 / 12228
Top 7%
Division (F18-39)
#0 / 5469
Top 12%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
6:59/mi
21:42
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:58/mi
43:22
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:00/mi
1:05:07
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:09/mi
1:27:19
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:56/mi
1:32:03
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:12/mi
1:49:30
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:27/mi
2:12:40
↑ 181↓ 1480.2%
138 ft elev
20M
7:23/mi
2:22:42
↑ 64↓ 500.2%
148 ft elev
21M
7:55/mi
2:30:37
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:00/mi
2:35:51
↑ 17↓ 861.7%
156 ft elev
23M
7:16/mi
2:44:57
↑ 23↓ 630.6%
116 ft elev
24M
7:06/mi
2:52:03
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:09/mi
2:58:10
↓ 200.3%
20 ft elev
25.2M
7:47/mi
3:00:51
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:50/mi
3:07:49
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:32:037:01 /mi⚡ faster
2nd Half
1:35:467:18 /mi+4.0%
Positive split — 4.0% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
21:426:593.11 mi21:42
6:59
-
10K
43:226:593.10 mi21:40
6:58
-0:01
15K
1:05:076:593.11 mi21:45
7:00
+0:02
20K
1:27:197:023.11 mi22:12
7:09
+0:09
Half(13.11 mi)
1:32:037:010.68 mi4:44
6:56
-0:13
25K
1:49:307:032.42 mi17:27
7:12
+0:16
30K
2:12:407:073.11 mi23:10
7:27
+0:15
20M
2:22:427:081.36 mi10:02
7:23
-0:04
21M
2:30:377:101.00 mi7:55
7:55
+0:32
35K
2:35:517:100.75 mi5:14
7:00
-0:55
23M
2:44:577:101.25 mi9:06
7:16
+0:16
24M
2:52:037:101.00 mi7:06
7:06
-0:10
40K
2:58:107:100.85 mi6:07
7:09
+0:03
25.2M
3:00:517:110.35 mi2:41
7:47
+0:38
Finish(26.22 mi)
3:07:497:101.02 mi6:58
6:50
-0:57
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

6:50 /mi

Average Pace

7:10 /mi

Slowest Pace

7:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:57:13

94% of race

Time at Steady Pace

10:36

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:10 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi77128888887648913913
10K3.10 mi7720-8894-6894-67772928928
15K3.11 mi7665+558948947648913913
20K3.11 mi7670-5905-11905-11779410271027
Half(13.11 mi)0.68 mi7636+34898+7898+77193817817
25K2.42 mi7576+60902-4902-4760410651065
30K3.11 mi7455+121901+1901+1744011771177
20M1.36 mi7298+157891+10891+106310889889
21M1.00 mi7211+87896-5896-5689712551255
35K0.75 mi7099+112882+14882+145365719719
23M1.25 mi6930+169861+21861+215290762762
24M1.00 mi6768+162845+16845+165246808808
40K0.85 mi6633+135832+13832+134831727727
25.2M0.35 mi6575+58825+7825+74854821821
Finish(26.22 mi)1.02 mi6434+141803+22803+224751776776

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21story building
+97ft-345ft

Overall

7648

Females

913

F18-39

913

5K→10K

3.1 - 6.2 mi

Top 27%
×5story building
+79ft-138ft

Overall

7772

Females

928

F18-39

928

10K→15K

6.2 - 9.3 mi

Top 27%
×3story building
+67ft-78ft

Overall

7648

Females

913

F18-39

913

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7794

Females

1027

F18-39

1027

20K→Half

12.4 - 13.1 mi

Top 25%
×2story building
+19ft-37ft

Overall

7193

Females

817

F18-39

817

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7604

Females

1065

F18-39

1065

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7440

Females

1177

F18-39

1177

30K→20M

18.6 - 20.0 mi

Top 22%
×5story building
+64ft-50ft

Overall

6310

Females

889

F18-39

889

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6897

Females

1255

F18-39

1255

21M→35K

21.0 - 21.8 mi

Top 19%
×7story building
+17ft-86ft

Overall

5365

Females

719

F18-39

719

35K→23M

21.8 - 23.0 mi

Top 19%
×5story building
+23ft-63ft

Overall

5290

Females

762

F18-39

762

23M→24M

23.0 - 24.0 mi

Top 18%
×6story building
+12ft-82ft

Overall

5246

Females

808

F18-39

808

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4831

Females

727

F18-39

727

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4854

Females

821

F18-39

821

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2story building
+22ft-21ft

Overall

4751

Females

776

F18-39

776

Passing Analysis

Category:
Passed
2042
Passed By
764
Net Change
+1278
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7712
5K → 10K189197-8#7712#7720
10K → 15K161106+55#7720#7665
15K → 20K143148-5#7665#7670
20K → Half4612+34#7670#7636
Half → 25K13777+60#7636#7576
25K → 30K231110+121#7576#7455
30K → 20M18023+157#7455#7298
20M → 21M13043+87#7298#7211
21M → 35K1142+112#7211#7099
35K → 23M1778+169#7099#6930
23M → 24M17210+162#6930#6768
24M → 40K1438+135#6768#6633
40K → 25.2M624+58#6633#6575
25.2M → Finish15716+141#6575#6434
TOTALS2042764+1278

Passing Charts

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