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BOSTON MARATHON 2025

Alicia Xiong

PA

Bib: 16164 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 37%
Division (F18-39)
#0 / 5469
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
7:35/mi
23:33
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:34/mi
47:03
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:35/mi
1:10:38
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:36/mi
1:34:15
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:29/mi
1:39:21
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:39/mi
1:57:55
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:37/mi
2:24:40
↑ 181↓ 1480.2%
138 ft elev
20M
8:06/mi
2:35:41
↑ 64↓ 500.2%
148 ft elev
21M
10:29/mi
2:46:10
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:17/mi
2:52:22
↑ 17↓ 861.7%
156 ft elev
23M
8:59/mi
3:03:37
↑ 23↓ 630.6%
116 ft elev
24M
8:34/mi
3:12:11
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:00/mi
3:20:44
↓ 200.3%
20 ft elev
25.2M
12:11/mi
3:24:56
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:02/mi
3:34:08
↑ 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
1:39:217:35 /mi⚡ faster
2nd Half
1:54:478:45 /mi+15.5%
Positive split — 15.5% 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
23:337:353.11 mi23:33
7:35
-
10K
47:037:343.10 mi23:30
7:34
-0:01
15K
1:10:387:353.11 mi23:35
7:35
+0:01
20K
1:34:157:353.11 mi23:37
7:36
+0:01
Half(13.11 mi)
1:39:217:350.68 mi5:06
7:29
-0:07
25K
1:57:557:352.42 mi18:34
7:39
+0:10
30K
2:24:407:463.11 mi26:45
8:37
+0:58
20M
2:35:417:471.36 mi11:01
8:06
-0:31
21M
2:46:107:551.00 mi10:29
10:29
+2:23
35K
2:52:227:560.75 mi6:12
8:17
-2:12
23M
3:03:377:591.25 mi11:15
8:59
+0:42
24M
3:12:118:001.00 mi8:34
8:34
-0:25
40K
3:20:448:050.85 mi8:33
10:00
+1:26
25.2M
3:24:568:080.35 mi4:12
12:11
+2:11
Finish(26.22 mi)
3:34:088:101.02 mi9:12
9:02
-3:09
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:29 /mi

Average Pace

8:10 /mi

Slowest Pace

12:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:39:21

46% of race

Time at Steady Pace

1:11:06

33% of race

Time at Slower Pace

43:41

20% of race

Average Pace: 8:10 /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 mi12961329932991254331903190
10K3.10 mi12778+1833218+813218+811271432103210
15K3.11 mi12681+973197+213197+211254331903190
20K3.11 mi12356+3253063+1343063+1341164528102810
Half(13.11 mi)0.68 mi12321+353051+123051+121159127502750
25K2.42 mi12093+2282966+852966+851123727132713
30K3.11 mi12751-6583396-4303396-4301545651495149
20M1.36 mi12605+1463365+313365+311120130493049
21M1.00 mi13185-5803714-3493714-3491995578777877
35K0.75 mi13216-313750-363750-361420147894789
23M1.25 mi13395-1793897-1473897-1471617059725972
24M1.00 mi13453-583952-553952-551495353485348
40K0.85 mi13859-4064220-2684220-2682046483848384
25.2M0.35 mi14143-2844368-1484368-1482357399509950
Finish(26.22 mi)1.02 mi14327-1844496-1284496-1281919877147714

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21story building
+97ft-345ft

Overall

12543

Females

3190

F18-39

3190

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12714

Females

3210

F18-39

3210

10K→15K

6.2 - 9.3 mi

Top 44%
×3story building
+67ft-78ft

Overall

12543

Females

3190

F18-39

3190

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

11645

Females

2810

F18-39

2810

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11591

Females

2750

F18-39

2750

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11237

Females

2713

F18-39

2713

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15456

Females

5149

F18-39

5149

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

11201

Females

3049

F18-39

3049

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

19955

Females

7877

F18-39

7877

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

14201

Females

4789

F18-39

4789

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16170

Females

5972

F18-39

5972

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14953

Females

5348

F18-39

5348

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20464

Females

8384

F18-39

8384

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

23573

Females

9950

F18-39

9950

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

19198

Females

7714

F18-39

7714

Passing Analysis

Category:
Passed
1863
Passed By
3229
Net Change
-1366
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12961
5K → 10K386203+183#12961#12778
10K → 15K235138+97#12778#12681
15K → 20K37651+325#12681#12356
20K → Half4813+35#12356#12321
Half → 25K27446+228#12321#12093
25K → 30K102760-658#12093#12751
30K → 20M19246+146#12751#12605
20M → 21M19599-580#12605#13185
21M → 35K4778-31#13185#13216
35K → 23M64243-179#13216#13395
23M → 24M64122-58#13395#13453
24M → 40K20426-406#13453#13859
40K → 25.2M2286-284#13859#14143
25.2M → Finish34218-184#14143#14327
TOTALS18633229-1366

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